Question: when did mike trout come into the league
[{'answer': 'July 8 , 2011', 'provenance': [{'wikipedia_id': '28047771', 'title': 'Mike Trout', 'start_paragraph_id': 20, 'start_character': 41, 'end_paragraph_id': 20, 'end_character': 54, 'bleu_score': 1.0, 'section': 'Section::::Professional career.:Los Angeles Angels.:2011.\n'}]}]