Question: who did de gea used to play for
[{'answer': 'Atlético Madrid', 'provenance': [{'wikipedia_id': '23536806', 'title': 'David de Gea', 'start_paragraph_id': 2, 'start_character': 53, 'end_paragraph_id': 2, 'end_character': 68, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23536806', 'title': 'David de Gea', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 449, 'bleu_score': 0.944475589384524, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15833052131533721839}, 'section': 'Section::::Abstract.'}]}]