Update duckdb index files

.gitattributes

@@ -68,3 +68,4 @@ explainlikeimfive/train.json filter=lfs diff=lfs merge=lfs -text
 legaladvice/train.json filter=lfs diff=lfs merge=lfs -text
 stanfordnlp--SHP/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 stanfordnlp--SHP/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+stanfordnlp--SHP/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

stanfordnlp--SHP/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:80502f54c4d30a007128447398f6d05907f495ef214fb14695d77cf5a2c1a15c
+size 1221603328