Question: when did the celebrities enter the big brother house
[{'answer': '2017', 'provenance': [{'wikipedia_id': '55182921', 'title': 'Celebrity Big Brother (American TV series)', 'start_paragraph_id': 3, 'start_character': 319, 'end_paragraph_id': 3, 'end_character': 323, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'February 7 , 2018', 'provenance': [{'wikipedia_id': '55182921', 'title': 'Celebrity Big Brother (American TV series)', 'start_paragraph_id': 1, 'start_character': 229, 'end_paragraph_id': 1, 'end_character': 249, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55182921', 'title': 'Celebrity Big Brother (American TV series)', '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': 8102469991190045683}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55182921', 'title': 'Celebrity Big Brother (American TV series)', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Celebrity Big Brother, also known as Big Brother: Celebrity Edition, is a reality television spin-off series of the American adaptation of "Big Brother" created by John de Mol. The series premiered on CBS in the United States on February 7, 2018 and is simulcast in Canada on Global', 'The series premiered on CBS in the United States on February 7, 2018 and is simulcast in Canada on Global.', 'The series premiered on CBS in the United States on February 7, 2018 and is simulcast in Canada on Global']}}]}]