Question: how many courts are there at roland garros
[{'answer': 'twenty', 'provenance': [{'wikipedia_id': '3516193', 'title': 'Stade Roland Garros', 'start_paragraph_id': 2, 'start_character': 43, 'end_paragraph_id': 2, 'end_character': 49, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3516193', 'title': 'Stade Roland Garros', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 320, 'bleu_score': 0.866058368465751, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4499806980523562644}, 'section': 'Section::::Abstract.'}]}]