Update duckdb index files

.gitattributes

@@ -58,3 +58,4 @@ default/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 20220301_simple_nltk/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 20220301_simple_nltk_tags_only/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 20220301_simple_spacy_tags_only/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+20220301_en_nltk/train/partial-index.duckdb filter=lfs diff=lfs merge=lfs -text

20220301_en_nltk/train/partial-index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:26e302c54b70cd2609bd6c7304c37cc0f3bcd927ae7d5db4262b3869e162158d
+size 8201449472