Question: when did ex on the beach season 7 start
[{'answer': '20 June 2017', 'provenance': [{'wikipedia_id': '53686361', 'title': 'Ex on the Beach (British series 7)', 'start_paragraph_id': 1, 'start_character': 86, 'end_paragraph_id': 1, 'end_character': 98, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '53686361', 'title': 'Ex on the Beach (British series 7)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 530, 'bleu_score': 0.919540814833198, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2368292254679890929}, 'section': 'Section::::Abstract.'}]}]