Question: who were the three european kings who participated in the third crusade
[{'answer': 'King Henry II of England', 'provenance': [{'wikipedia_id': '106131', 'title': 'Third Crusade', 'start_paragraph_id': 3, 'start_character': 357, 'end_paragraph_id': 3, 'end_character': 381, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'King Philip II of France', 'provenance': [{'wikipedia_id': '106131', 'title': 'Third Crusade', 'start_paragraph_id': 3, 'start_character': 386, 'end_paragraph_id': 3, 'end_character': 410, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Frederick Barbarossa', 'provenance': [{'wikipedia_id': '106131', 'title': 'Third Crusade', 'start_paragraph_id': 4, 'start_character': 27, 'end_paragraph_id': 4, 'end_character': 47, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '106131', 'title': 'Third Crusade', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 638, 'bleu_score': 0.510159795026605, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10856186760858775238}, 'section': 'Section::::Abstract.'}]}]