Question: when does the mlb season start and finish
[{'answer': 'March 29', 'provenance': [{'wikipedia_id': '54755172', 'title': '2018 Major League Baseball season', 'start_paragraph_id': 1, 'start_character': 47, 'end_paragraph_id': 1, 'end_character': 55, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'March 29 -- October 31 , 2018'}, {'answer': 'scheduled to end on September 30'}, {'answer': 'October 31 , 2018'}, {'answer': 'began on March 29 , 2018'}, {'provenance': [{'wikipedia_id': '54755172', 'title': '2018 Major League Baseball season', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['The 2018 Major League Baseball season began on March 29, 2018. The regular season ended on October 1, extended a day for tiebreaker games to decide the winners of the National League Central and National League West divisions. The postseason began on October 2.', 'The 2018 Major League Baseball season began on March 29, 2018.', 'e 2018 Major League Baseball season began on March 29, 2018.']}}]}]