Question: helicobacter pylori is implicated as a causative agent in the development
[{'answer': 'duodenal and gastric ulcers', 'provenance': [{'wikipedia_id': '199665', 'title': 'Helicobacter pylori', 'start_paragraph_id': 74, 'start_character': 829, 'end_paragraph_id': 74, 'end_character': 856, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '199665', 'title': 'Helicobacter pylori', 'start_paragraph_id': 74, 'start_character': 0, 'end_paragraph_id': 74, 'end_character': 949, 'bleu_score': 0.9864398934896761, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10716293994130144917}, 'section': 'Section::::History.\n'}]}]