Question: what are the three main branches of phonetics
[{'answer': 'Articulatory phonetics', 'provenance': [{'wikipedia_id': '23194', 'title': 'Phonetics', 'start_paragraph_id': 3, 'start_character': 12, 'end_paragraph_id': 3, 'end_character': 34, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Acoustic phonetics', 'provenance': [{'wikipedia_id': '23194', 'title': 'Phonetics', 'start_paragraph_id': 69, 'start_character': 0, 'end_paragraph_id': 69, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Acoustic and auditory phonetics.\n'}]}, {'answer': 'Auditory phonetics', 'provenance': [{'wikipedia_id': '23194', 'title': 'Phonetics', 'start_paragraph_id': 70, 'start_character': 0, 'end_paragraph_id': 70, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Acoustic and auditory phonetics.\n'}]}]