Question: what causes the tide to come in and out
[{'answer': 'the rotation of Earth'}, {'answer': 'the combined effects of the gravitational forces exerted by the Moon and the Sun'}, {'provenance': [{'wikipedia_id': '30718', 'title': 'Tide', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 163, 'bleu_score': 0.909172661890935, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11073903259967513846}, 'section': 'Section::::Abstract.'}]}]