Question: when does the champions league quarter finals start
[{'answer': '16 March 2018', 'provenance': [{'wikipedia_id': '54326297', 'title': '2017–18 UEFA Champions League knockout phase', 'start_paragraph_id': 31, 'start_character': 44, 'end_paragraph_id': 31, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Quarter-finals.\n'}]}, {'answer': '3 -- 4 April 2018'}, {'provenance': [{'wikipedia_id': '54326297', 'title': '2017–18 UEFA Champions League knockout phase', 'start_paragraph_id': 31, 'start_character': 0, 'end_paragraph_id': 31, 'end_character': 57, 'bleu_score': 0.675316032742297, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5467290052680222812}, 'section': 'Section::::Quarter-finals.\n'}]}, {'provenance': [{'wikipedia_id': '54326297', 'title': '2017–18 UEFA Champions League knockout phase', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5467290052680222812}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '54326297', 'title': '2017–18 UEFA Champions League knockout phase', 'start_paragraph_id': 34, 'start_character': 0, 'end_paragraph_id': 34, 'end_character': 100, 'bleu_score': 0.910879922930628, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5467290052680222812}, 'section': 'Section::::Quarter-finals.:Summary.\n'}]}, {'provenance': [{'wikipedia_id': '54326297', 'title': '201718 UEFA Champions League knockout phase', 'section': 'Section::::Quarter-finals.\n', 'start_paragraph_id': 31, 'end_paragraph_id': 31, 'meta': {'evidence_span': ['The draw for the quarter-finals was held on 16 March 2018, 12:00 CET.section end=QF /', 'The draw for the quarter-finals was held on 16 March 2018, 12:00 CET.section end=QF /', 'The draw for the quarter-finals was held on 16 March 2018, 12:00 CET.section end=QF']}}]}]