Question: where does the bacteria that causes ulcers come from
[{'answer': 'Helicobacter pylori', 'provenance': [{'wikipedia_id': '199665', 'title': 'Helicobacter pylori', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '199665', 'title': 'Helicobacter pylori', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 589, 'bleu_score': 0.9263456861890341, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15570227682387574989}, 'section': 'Section::::Abstract.'}]}]