Update duckdb index files

xmj2002--tang_poems/train/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:70a6519480394eb6720a0f16ae6298804f74eb6f2387602ca9823c1c38ad8827
-size 6828032
+oid sha256:3e70b17a370a83abf2792b1620c76dd2d85275916c4fdff06d85f7d43ae75d79
+size 4993024