Question: when did this year's world cup start
[{'answer': 'Thursday , 14 June 2018', 'provenance': [{'wikipedia_id': '13327177', 'title': '2018 FIFA World Cup', 'start_paragraph_id': 138, 'start_character': 35, 'end_paragraph_id': 138, 'end_character': 58, 'bleu_score': 1.0, 'section': 'Section::::Opening ceremony.\n'}]}, {'provenance': [{'wikipedia_id': '13327177', 'title': '2018 FIFA World Cup', 'start_paragraph_id': 138, 'start_character': 0, 'end_paragraph_id': 138, 'end_character': 177, 'bleu_score': 0.9321022168949711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18435287491424347173}, 'section': 'Section::::Opening ceremony.\n'}]}]