Question: what is the largest branch of psychology today
[{'answer': 'Clinical psychology', 'provenance': [{'wikipedia_id': '492271', 'title': 'Clinical psychology', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '492271', 'title': 'Clinical psychology', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 568, 'bleu_score': 0.9720210313175831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8720542727267350612}, 'section': 'Section::::Abstract.'}]}]