Question: who wrote the song we are the champions
[{'answer': 'Freddie Mercury', 'provenance': [{'wikipedia_id': '146788', 'title': 'We Are the Champions', 'start_paragraph_id': 1, 'start_character': 144, 'end_paragraph_id': 1, 'end_character': 159, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '146788', 'title': 'We Are the Champions', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 244, 'bleu_score': 0.9569637990759251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8837931796132443292}, 'section': 'Section::::Abstract.'}]}]