Question: what type of wave is the light mechanical or electromagnetic
[{'answer': 'electromagnetic', 'provenance': [{'wikipedia_id': '162312', 'title': 'Mechanical wave', 'start_paragraph_id': 1, 'start_character': 439, 'end_paragraph_id': 1, 'end_character': 454, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '162312', 'title': 'Mechanical wave', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 219, 'bleu_score': 0.953991849837532, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15486036486696914169}, 'section': 'Section::::Transverse wave.\n'}]}]