add context columns

data/test/test.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:3943f1f82bee48e612279b8ea6a7d7086abdee7990c33f7fe17cc561e155818a
-size 1106474
+oid sha256:f513ff72d291d98e8c23104fad9e47388fd4f1c1f922e64aab0f1a28d1c59446
+size 17943043

data/train/train.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:8aeab6f0678c795e0e82c55259287ff16e5a5d2c5001d53328482660b6ca6a72
-size 5430804
+oid sha256:fd164245af6b2c4bf30edc4d1608db8ef7dec754154a4e13a1076cbef97063a0
+size 90712550

data/validation/validation.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:f2dcb0cd5dc69cc68799c6e59dbfb6b7523f95b0ecefd672435ce9bc0dce4665
-size 1205285
+oid sha256:8466bdddbcf47d472c0388dafe8e2109643a1a4f29b84d2fab47cfaa8bfa3e3f
+size 20239905