Question: how many goals have messi scored for barcelona
[{'answer': '34 goals', 'provenance': [{'wikipedia_id': '2150841', 'title': 'Lionel Messi', 'start_paragraph_id': 28, 'start_character': 946, 'end_paragraph_id': 28, 'end_character': 954, 'bleu_score': 1.0, 'section': 'Section::::Club career.:Barcelona.:2009–11: Sustained success.\n'}]}, {'provenance': [{'wikipedia_id': '2150841', 'title': 'Lionel Messi', 'start_paragraph_id': 28, 'start_character': 0, 'end_paragraph_id': 28, 'end_character': 1072, 'bleu_score': 0.9186598212042301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 656110559578294979}, 'section': 'Section::::Club career.:Barcelona.:2009–11: Sustained success.\n'}]}]