Question: when does the pharyngeal phase of the swallow begin
[{'answer': 'Closure of the nasopharynx', 'provenance': [{'wikipedia_id': '196983', 'title': 'Swallowing', 'start_paragraph_id': 22, 'start_character': 3, 'end_paragraph_id': 22, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::In humans.:Phases.:Pharyngeal phase.\n'}]}, {'provenance': [{'wikipedia_id': '196983', 'title': 'Swallowing', 'start_paragraph_id': 22, 'start_character': 0, 'end_paragraph_id': 22, 'end_character': 29, 'bleu_score': 0.6147881529512641, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4234510677664381462}, 'section': 'Section::::In humans.:Phases.:Pharyngeal phase.\n'}]}]