Question: which type of receptor is present in the cardiac wall and responds to stimulation by the vagus nerve
[{'answer': 'Arterial baroreceptors', 'provenance': [{'wikipedia_id': '242100', 'title': 'Baroreceptor', 'start_paragraph_id': 4, 'start_character': 11, 'end_paragraph_id': 4, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '242100', 'title': 'Baroreceptor', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 865, 'bleu_score': 0.7661384618664691, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8579025375209111470}, 'section': 'Section::::Arterial baroreceptors.\n'}]}]