specific feature dtypes

train.jsonl

@@ -3550,7 +3550,7 @@
 {"city": "Rodos", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 36.4408333, "longitude": 28.2224998, "x": 4515.9778865570315, "y": 2423.7298461525716, "z": 3784.3253508382595}
 {"city": "Serres", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 41.0855556, "longitude": 23.5497227, "x": 4402.066502082624, "y": 1918.617187131316, "z": 4186.927226557248}
 {"city": "Chania", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 35.5122222, "longitude": 24.0155563, "x": 4737.019650614248, "y": 2110.5983095796746, "z": 3700.764867604248}
-{"city": NaN, "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 38.4636111, "longitude": 23.5994453, "x": 4571.308023660421, "y": 1997.102664962495, "z": 3962.87331344538}
+{"city": "nan", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 38.4636111, "longitude": 23.5994453, "x": 4571.308023660421, "y": 1997.102664962495, "z": 3962.87331344538}
 {"city": "Katerini", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 40.2719444, "longitude": 22.5025005, "x": 4490.8760605856905, "y": 1860.411392681374, "z": 4118.317940426613}
 {"city": "Alexandroupolis", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 40.8475, "longitude": 25.874445, "x": 4336.233631511264, "y": 2103.1723837900645, "z": 4166.939502442224}
 {"city": "Petroupolis", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 38.05, "longitude": 23.6833324, "x": 4594.458045511801, "y": 2015.2321874102568, "z": 3926.7589051096015}
@@ -3602,7 +3602,7 @@
 {"city": "Arta", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 39.1605556, "longitude": 20.9852772, "x": 4612.288151517371, "y": 1769.1318568278743, "z": 4023.258813515385}
 {"city": "Kos", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 36.8933333, "longitude": 27.2888889, "x": 4528.167634417132, "y": 2336.049647490935, "z": 3824.6844208476377}
 {"city": "Edessa", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 40.8005556, "longitude": 22.0472221, "x": 4470.1087158228665, "y": 1810.3281563279234, "z": 4162.989434905015}
-{"city": NaN, "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 38.3701939, "longitude": 21.4295197, "x": 4649.655317168041, "y": 1824.9440464154493, "z": 3954.734587678895}
+{"city": "nan", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 38.3701939, "longitude": 21.4295197, "x": 4649.655317168041, "y": 1824.9440464154493, "z": 3954.734587678895}
 {"city": "Ellinikon", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 37.8833333, "longitude": 23.7333336, "x": 4603.134652283748, "y": 2023.8297122407496, "z": 3912.148472233141}
 {"city": "Preveza", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 38.95, "longitude": 20.75, "x": 4633.308715794524, "y": 1755.4036435371543, "z": 4005.0779508517653}
 {"city": "Koropion", "country": "Greece", "region": "Southern Europe", "continent": "Europe", "latitude": 37.9, "longitude": 23.8833332, "x": 4596.779774359348, "y": 2035.412874523337, "z": 3913.611009830367}
@@ -8786,14 +8786,14 @@
 {"city": "Kremenchuk", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 49.0666667, "longitude": 33.4166679, "x": 3484.115438249781, "y": 2298.80536517358, "z": 4813.114844463895}
 {"city": "Bila Tserkva", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 49.7833333, "longitude": 30.1166668, "x": 3558.309337914354, "y": 2064.0629045643386, "z": 4864.948096507603}
 {"city": "Kerch", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 45.3583333, "longitude": 36.4758339, "x": 3599.7607362649824, "y": 2661.3339236992188, "z": 4533.063576458278}
-{"city": NaN, "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 48.8666667, "longitude": 37.6166649, "x": 3319.686597883252, "y": 2558.0413719412977, "z": 4798.515002713964}
+{"city": "nan", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 48.8666667, "longitude": 37.6166649, "x": 3319.686597883252, "y": 2558.0413719412977, "z": 4798.515002713964}
 {"city": "Uzhhorod", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 48.6166667, "longitude": 22.2999992, "x": 3896.8238227440743, "y": 1598.2038601056254, "z": 4780.183000266595}
 {"city": "Pavlohrad", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 48.5166667, "longitude": 35.8666649, "x": 3419.9478409427456, "y": 2472.598263394928, "z": 4772.8246975022485}
 {"city": "Lisichansk", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 48.9191667, "longitude": 38.4158325, "x": 3280.2385854615572, "y": 2601.3612314580873, "z": 4802.353127990072}
 {"city": "Yevpatoriya", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 45.1972222, "longitude": 33.355835, "x": 3749.9063597462623, "y": 2468.4625130434647, "z": 4520.457511672207}
 {"city": "Yenakiyeve", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 48.2322222, "longitude": 38.2161102, "x": 3334.2866942918668, "y": 2625.3433149378584, "z": 4751.814992082426}
 {"city": "Oleksandriya", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 48.6697222, "longitude": 33.1205559, "x": 3523.792625416693, "y": 2298.9334075114775, "z": 4784.0810738204045}
-{"city": NaN, "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 48.6666667, "longitude": 26.5666676, "x": 3763.3874805333376, "y": 1881.8264575377345, "z": 4783.856692573045}
+{"city": "nan", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 48.6666667, "longitude": 26.5666676, "x": 3763.3874805333376, "y": 1881.8264575377345, "z": 4783.856692573045}
 {"city": "Konotop", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 51.2333333, "longitude": 33.2000008, "x": 3338.023177257973, "y": 2184.3412264756575, "z": 4967.48383735744}
 {"city": "Kostyantynivka", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 48.5333333, "longitude": 37.7166672, "x": 3337.2439190536356, "y": 2580.8662690706983, "z": 4774.052086635903}
 {"city": "Krasnyy Luch", "country": "Ukraine", "region": "Eastern Europe", "continent": "Europe", "latitude": 48.1330556, "longitude": 38.9324989, "x": 3307.5940350027545, "y": 2671.990971412051, "z": 4744.4627670903565}
@@ -9080,4 +9080,4 @@
 {"city": "Beatrice", "country": "Zimbabwe", "region": "Eastern Africa", "continent": "Africa", "latitude": -18.2666667, "longitude": 30.8666668, "x": 5193.058561630529, "y": 3103.8795230633696, "z": -1996.9265589359486}
 {"city": "Kamativi", "country": "Zimbabwe", "region": "Eastern Africa", "continent": "Africa", "latitude": -18.3166667, "longitude": 27.0666676, "x": 5385.793782102626, "y": 2752.0973753199005, "z": -2002.2053774330927}
 {"city": "Lalapansi", "country": "Zimbabwe", "region": "Eastern Africa", "continent": "Africa", "latitude": -19.3333333, "longitude": 30.1833324, "x": 5196.666059532186, "y": 3022.508395246413, "z": -2109.2050318475854}
-{"city": "Madziwa", "country": "Zimbabwe", "region": "Eastern Africa", "continent": "Africa", "latitude": -16.9166667, "longitude": 31.5333328, "x": 5195.261248806646, "y": 3187.819101364827, "z": -1853.8368141833735}
+{"city": "Madziwa", "country": "Zimbabwe", "region": "Eastern Africa", "continent": "Africa", "latitude": -16.9166667, "longitude": 31.5333328, "x": 5195.261248806646, "y": 3187.819101364827, "z": -1853.8368141833735}