Question: where is the hospital used in grey's anatomy
[{'answer': 'North Hills , California', 'provenance': [{'wikipedia_id': '1660277', 'title': "Grey's Anatomy", 'start_paragraph_id': 41, 'start_character': 159, 'end_paragraph_id': 41, 'end_character': 183, 'bleu_score': 1.0, 'section': 'Section::::Production and development.:Filming locations and techniques.\n'}]}, {'provenance': [{'wikipedia_id': '1660277', 'title': "Grey's Anatomy", 'start_paragraph_id': 41, 'start_character': 0, 'end_paragraph_id': 41, 'end_character': 848, 'bleu_score': 0.519134984251294, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17435841466551165056}, 'section': 'Section::::Production and development.:Filming locations and techniques.\n'}]}]