Question: what is the difference between dysphagia and odynophagia
[{'answer': 'difficulty', 'provenance': [{'wikipedia_id': '196920', 'title': 'Dysphagia', 'start_paragraph_id': 1, 'start_character': 13, 'end_paragraph_id': 1, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'painful', 'provenance': [{'wikipedia_id': '196920', 'title': 'Dysphagia', 'start_paragraph_id': 2, 'start_character': 294, 'end_paragraph_id': 2, 'end_character': 301, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '196920', 'title': 'Dysphagia', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 572, 'bleu_score': 0.9768747032089851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3633988245253515443}, 'section': 'Section::::Abstract.'}]}]