Question: when did the song we will rock you come out
[{'answer': '1977', 'provenance': [{'wikipedia_id': '292960', 'title': 'We Will Rock You', 'start_paragraph_id': 1, 'start_character': 82, 'end_paragraph_id': 1, 'end_character': 86, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '292960', 'title': 'We Will Rock You', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 339, 'bleu_score': 0.970795021215021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5488360896552877399}, 'section': 'Section::::Abstract.'}]}]