Question: layer of digestive tract that contains blood vessels
[{'answer': 'lamina propria', 'provenance': [{'wikipedia_id': '41543593', 'title': 'Gastrointestinal wall', 'start_paragraph_id': 6, 'start_character': 811, 'end_paragraph_id': 6, 'end_character': 825, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41543593', 'title': 'Gastrointestinal wall', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 1055, 'bleu_score': 0.988200073497952, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1491715789244128397}, 'section': 'Section::::Abstract.'}]}]