Question: when did the 1st planet of the apes come out
[{'answer': '1968', 'provenance': [{'wikipedia_id': '24404702', 'title': 'Planet of the Apes', 'start_paragraph_id': 1, 'start_character': 371, 'end_paragraph_id': 1, 'end_character': 375, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24404702', 'title': 'Planet of the Apes', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 659, 'bleu_score': 0.7996764165710221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8943808016251214043}, 'section': 'Section::::Abstract.'}]}]