Question: how many goals has rakitic scored for barcelona
[{'answer': '20', 'provenance': [{'wikipedia_id': '5748748', 'title': 'Ivan Rakitić', 'start_paragraph_id': 2, 'start_character': 212, 'end_paragraph_id': 2, 'end_character': 214, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]