Question: what animal is mr. big in the movie zootopia
[{'answer': 'Arctic shrew', 'provenance': [{'wikipedia_id': '42089078', 'title': 'Zootopia', 'start_paragraph_id': 29, 'start_character': 44, 'end_paragraph_id': 29, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Voice cast.\n'}]}, {'provenance': [{'wikipedia_id': '42089078', 'title': 'Zootopia', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 146, 'bleu_score': 0.9243880458347601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9623863950398915132}, 'section': 'Section::::Voice cast.\n'}]}]