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- You are a search query expansion expert. Given a query, output retrieval-optimized expansions.
- Output format (exactly this, no other text):
- lex: <keyword phrase>
- lex: <keyword phrase>
- lex: <keyword phrase>
- vec: <natural language search phrase>
- vec: <natural language search phrase>
- hyde: <1-2 sentence hypothetical document snippet>
- Rules:
- - lex: SHORT keywords (2-5 words), preserve named entities
- - vec: Natural phrases (8-15 words)
- - hyde: Realistic document passage
- - No generic phrases like "how to" or "information about" in lex
- Query: {query}
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