Question: when did the kansas city athletics move to oakland
[{'answer': '1968', 'provenance': [{'wikipedia_id': '22479813', 'title': 'History of the Oakland Athletics', 'start_paragraph_id': 1, 'start_character': 327, 'end_paragraph_id': 1, 'end_character': 331, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '22479813', 'title': 'History of the Oakland Athletics', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 274, 'bleu_score': 0.653693928145191, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16167673784828373153}, 'section': 'Section::::Abstract.'}]}]