Question: how many goals has suarez scored at barcelona
[{'answer': '87', 'provenance': [{'wikipedia_id': '7819615', 'title': 'Luis Suárez', 'start_paragraph_id': 1, 'start_character': 46, 'end_paragraph_id': 1, 'end_character': 48, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]