Update duckdb index files

.gitattributes

@@ -81,3 +81,4 @@ cite_prediction/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cite_prediction_new/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 high_influence_cite/evaluation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 high_influence_cite/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+high_influence_cite/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

high_influence_cite/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5b6defc285642e9dfb58800c213a1a3a59617243509682cc7bd5adf788cb7115
+size 5553532928