Question: protein that serves as the precursor molecular for thyroid hormones
[{'answer': 'Thyroglobulin ( Tg )', 'provenance': [{'wikipedia_id': '18455584', 'title': 'Thyroid hormones', 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Production.:Central.\n'}]}, {'provenance': [{'wikipedia_id': '18455584', 'title': 'Thyroid hormones', 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 1090, 'bleu_score': 0.9568715944595071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6699197125096121262}, 'section': 'Section::::Production.:Central.\n'}]}]