Question: approximately how many different languages are spoken in nigeria a. 6 c. 75 b. 29 d. 180
[{'answer': '500', 'provenance': [{'wikipedia_id': '21383', 'title': 'Nigeria', 'start_paragraph_id': 3, 'start_character': 565, 'end_paragraph_id': 3, 'end_character': 568, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21383', 'title': 'Nigeria', 'start_paragraph_id': 3, 'start_character': 8, 'end_paragraph_id': 3, 'end_character': 1040, 'bleu_score': 0.812616026087118, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12660098025294047664}, 'section': 'Section::::Abstract.'}]}]