Question: what religion is most common in africa south of the sahara desert
[{'answer': 'Christian', 'provenance': [{'wikipedia_id': '27067', 'title': 'Sub-Saharan Africa', 'start_paragraph_id': 135, 'start_character': 47, 'end_paragraph_id': 135, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Religion.\n'}]}, {'provenance': [{'wikipedia_id': '27067', 'title': 'Sub-Saharan Africa', 'start_paragraph_id': 135, 'start_character': 0, 'end_paragraph_id': 135, 'end_character': 493, 'bleu_score': 0.9751504244977051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13310541368610876793}, 'section': 'Section::::Religion.\n'}]}]