Question: who is the host of the x factor
[{'answer': 'Mario Lopez', 'provenance': [{'wikipedia_id': '33933753', 'title': 'The X Factor (American TV series)', 'start_paragraph_id': 4, 'start_character': 352, 'end_paragraph_id': 4, 'end_character': 363, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '33933753', 'title': 'The X Factor (American TV series)', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 570, 'bleu_score': 0.92450369645807, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3598240143151353125}, 'section': 'Section::::Abstract.'}]}]