Question: a seismic wave that travels along the earth surface
[{'answer': 'surface waves', 'provenance': [{'wikipedia_id': '89830', 'title': 'Seismic wave', 'start_paragraph_id': 5, 'start_character': 131, 'end_paragraph_id': 5, 'end_character': 144, 'bleu_score': 1.0, 'section': 'Section::::Types.\n'}]}, {'provenance': [{'wikipedia_id': '89830', 'title': 'Seismic wave', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 182, 'bleu_score': 0.9364250605898111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2041624403720443181}, 'section': 'Section::::Types.\n'}]}]