Question: when is the british open played this year
[{'answer': '20 -- 23 July'}, {'provenance': [{'wikipedia_id': '51092891', 'title': '2017 Open Championship', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 250, 'bleu_score': 0.8752376177722321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16627426406032111543}, 'section': 'Section::::Abstract.'}]}]