{"query": "best sample phone", "preferred": "doc_a", "rejected": "doc_b"}
{"query": "best sample phone", "preferred": "doc_a", "rejected": "doc_b"}
{"query": "best sample phone", "preferred": "doc_a", "rejected": "doc_b"}
{"query": "best sample phone", "preferred": "doc_a", "rejected": "doc_b"}
{"query": "best sample phone", "preferred": "doc_a", "rejected": "doc_b"}
{"query": "best sample phone", "preferred": "doc_a", "rejected": "doc_b"}