Question: who has won the 2018 men's singles tata open maharashtra tennis tournament
[{'answer': 'Gilles Simon', 'provenance': [{'wikipedia_id': '55659853', 'title': '2018 Tata Open Maharashtra', 'start_paragraph_id': 35, 'start_character': 12, 'end_paragraph_id': 35, 'end_character': 24, 'bleu_score': 1.0, 'section': "Section::::Champions.:Men's Singles.\n"}]}]