Question: when did hitchhikers guide to the galaxy come out
[{'answer': '1978', 'provenance': [{'wikipedia_id': '31353', 'title': "The Hitchhiker's Guide to the Galaxy", 'start_paragraph_id': 1, 'start_character': 209, 'end_paragraph_id': 1, 'end_character': 213, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31353', 'title': "The Hitchhiker's Guide to the Galaxy", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 356, 'bleu_score': 0.55130924204313, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13908674161442473532}, 'section': 'Section::::Abstract.'}]}]