Question: what is the name of the instrument used to measure wind speed
[{'answer': 'anemometer', 'provenance': [{'wikipedia_id': '2994', 'title': 'Anemometer', 'start_paragraph_id': 1, 'start_character': 3, 'end_paragraph_id': 1, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2994', 'title': 'Anemometer', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 332, 'bleu_score': 0.84047893107305, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9315777128689894759}, 'section': 'Section::::Abstract.'}]}]