Question: this is a type of motion that has a basic pattern which is repeated at regular intervals
[{'answer': 'periodic function', 'provenance': [{'wikipedia_id': '76848', 'title': 'Periodic function', 'start_paragraph_id': 1, 'start_character': 18, 'end_paragraph_id': 1, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '76848', 'title': 'Periodic function', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 392, 'bleu_score': 0.9210921090251241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16345239582654397864}, 'section': 'Section::::Abstract.'}]}]