Update README.md

README.md

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 # Query Expansion Dataset
-Dataset for training search query expansion models with diverse search queries and multiple semantic expansions.
+Dataset for training search query expansion models with multiple semantic expansions.
 
 ## Structure
 
 **Format**: JSONL  
-**Query types**: Informational, Navigational, Transactional, Commercial
-Each entry:
+**Query types**: Informational, Navigational, Transactional, Commercial  
+**Each entry**:  
 - Original query
 - 3-7 semantic expansions