Question: when did spock first say live long and prosper
[{'answer': 'Amok Time', 'provenance': [{'wikipedia_id': '695624', 'title': 'Vulcan salute', 'start_paragraph_id': 4, 'start_character': 87, 'end_paragraph_id': 4, 'end_character': 96, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'provenance': [{'wikipedia_id': '695624', 'title': 'Vulcan salute', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 378, 'bleu_score': 0.8754202762480401, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8440168658870911931}, 'section': 'Section::::"Live long and prosper".\n'}]}]