Question: where is the fulcrum located in a first class lever
[{'answer': 'in the middle', 'provenance': [{'wikipedia_id': '38857', 'title': 'Lever', 'start_paragraph_id': 19, 'start_character': 77, 'end_paragraph_id': 19, 'end_character': 90, 'bleu_score': 1.0, 'section': 'Section::::Classes of levers.\n'}]}, {'provenance': [{'wikipedia_id': '38857', 'title': 'Lever', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 263, 'bleu_score': 0.958740481558872, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12348074463865514332}, 'section': 'Section::::Classes of levers.\n'}]}]