Question: which ruler fought on banks of the jhelum river
[{'answer': 'Alexander the Great', 'provenance': [{'wikipedia_id': '23145268', 'title': 'History of Jhelum', 'start_paragraph_id': 2, 'start_character': 83, 'end_paragraph_id': 2, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Raja Porus', 'provenance': [{'wikipedia_id': '23145268', 'title': 'History of Jhelum', 'start_paragraph_id': 2, 'start_character': 107, 'end_paragraph_id': 2, 'end_character': 117, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23145268', 'title': 'History of Jhelum', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 608, 'bleu_score': 0.9808590314834971, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11989494068069839836}, 'section': 'Section::::Abstract.'}]}]