Update duckdb index files

.gitattributes

@@ -52,3 +52,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpg filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
+yemen2016--memo/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

yemen2016--memo/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3b7133e38769d9326cec6eead7d6d6989133e0eca7d635606c7ab9991cd68541
+size 568864768