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
+ttss--rdf-summarization/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

ttss--rdf-summarization/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:26d93504a13320bbba889f417c04dd2134bbf8a1b579035cdcdda7d6ba2886e6
+size 20459520