Question: which type of plate boundary is in the southern california region
[{'answer': 'continental transform fault', 'provenance': [{'wikipedia_id': '64460', 'title': 'San Andreas Fault', 'start_paragraph_id': 1, 'start_character': 27, 'end_paragraph_id': 1, 'end_character': 54, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '64460', 'title': 'San Andreas Fault', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 403, 'bleu_score': 0.7841111507645541, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17279445099489840157}, 'section': 'Section::::Abstract.'}]}]