Question: when does season 8 of hawaii five o premiere
[{'answer': 'September 29 , 2017', 'provenance': [{'wikipedia_id': '54900847', 'title': 'Hawaii Five-0 (2010 TV series, season 8)', 'start_paragraph_id': 49, 'start_character': 83, 'end_paragraph_id': 49, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Production.\n'}]}, {'provenance': [{'wikipedia_id': '54900847', 'title': 'Hawaii Five-0 (2010 TV series, season 8)', 'section': 'Section::::Production.\n', 'start_paragraph_id': 49, 'end_paragraph_id': 49, 'meta': {'evidence_span': ["On March 23, 2017, CBS renewed the series for an eighth season, which premiered on September 29, 2017. Filming for the season began on July 8, 2017 with a traditional Hawaiian blessing. Series star Alex O'Loughlin made both his writer and directorial debut during the season. O'Loughlin directed the eighteenth episode of the season and wrote the story for the twenty-fourth episode of the season. The final script for the season was written around early March 2018. Filming on the final episode of the season concluded in the third week of April. The final episode of the season aired on May 18, 2018.", 'On March 23, 2017, CBS renewed the series for an eighth season, which premiered on September 29, 2017.', "On March 23, 2017, CBS renewed the series for an eighth season, which premiered on September 29, 2017. Filming for the season began on July 8, 2017 with a traditional Hawaiian blessing. Series star Alex O'Loughlin made both his writer and directorial debut during the season."]}}]}]