Question: what are produced by bacteria and cut dna at specific points
[{'answer': 'restriction enzymes', 'provenance': [{'wikipedia_id': '335864', 'title': 'Restriction modification system', 'start_paragraph_id': 2, 'start_character': 14, 'end_paragraph_id': 2, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '335864', 'title': 'Restriction modification system', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 1287, 'bleu_score': 0.7736743480085421, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9547268561161234590}, 'section': 'Section::::History.\n'}]}]