Question: the south west wind blows across nigeria between
[{'answer': 'till September', 'provenance': [{'wikipedia_id': '21385', 'title': 'Geography of Nigeria', 'start_paragraph_id': 12, 'start_character': 651, 'end_paragraph_id': 12, 'end_character': 665, 'bleu_score': 1.0, 'section': 'Section::::Climate types found in Nigeria.\n'}]}, {'answer': 'arrives in central Nigeria in July'}, {'provenance': [{'wikipedia_id': '21385', 'title': 'Geography of Nigeria', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 910, 'bleu_score': 0.8493519606009191, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9194516381188718626}, 'section': 'Section::::Climate types found in Nigeria.\n'}]}, {'provenance': [{'wikipedia_id': '21385', 'title': 'Geography of Nigeria', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9194516381188718626}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21385', 'title': 'Geography of Nigeria', 'section': 'Section::::Climate types found in Nigeria.\n', 'start_paragraph_id': 12, 'end_paragraph_id': 12, 'meta': {'evidence_span': ['With the Intertropical Convergence Zone (ITCZ) swinging northward over West Africa from the Southern Hemisphere in April, heavy showers coming from pre-monsoonal convective clouds mainly in the form of squall lines also known as the north easterlies formed mainly as a result of the interactions of the two dominant airmasses in Nigeria known as the Maritime tropical(south westerlies) and the Continental tropical(north easterlies), begins in central Nigeria while the Monsoons from the south atlantic ocean arrives in central Nigeria in July bringing with it high humidity, heavy cloud cover and heavy rainfall which can be daily occurrence lasting till September when the monsoons gradually begin retreating southward to the southern part of Nigeria. Rainfall totals in central Nigeria varies from in the lowlands of the river Niger Benue trough to over along the south western escarpment of the Jos Plateau.', 'heavy cloud cover and heavy rainfall which can be daily occurrence lasting till September when the monsoons gradually begin retreating southward to the southern part of Nigeria.', 'till September']}}]}]