Question: where does sheldon work in big bang theory
[{'answer': 'Caltech', 'provenance': [{'wikipedia_id': '19606216', 'title': 'Sheldon Cooper', 'start_paragraph_id': 2, 'start_character': 95, 'end_paragraph_id': 2, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19606216', 'title': 'Sheldon Cooper', 'start_paragraph_id': 2, 'start_character': 167, 'end_paragraph_id': 2, 'end_character': 1217, 'bleu_score': 0.6607104815583991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8472480973135655934}, 'section': 'Section::::Abstract.'}]}]