Question: in which regions are most of africa petroleum and natural gas found
[{'answer': 'Nigeria', 'provenance': [{'wikipedia_id': '3542988', 'title': 'Petroleum industry in Nigeria', 'start_paragraph_id': 0, 'start_character': 22, 'end_paragraph_id': 0, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3542988', 'title': 'Petroleum industry in 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': 4201599977412471453}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3542988', 'title': 'Petroleum industry in Nigeria', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 244, 'bleu_score': 0.8723360571509821, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4201599977412471453}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '32115480', 'title': 'Energy in Nigeria', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ["Nigeria's primary energy consumption was about 108 Mtoe in 2011. Most of the energy comes from traditional biomass and waste, which account for 83% of total primary production. The rest is from fossil fuels (16%) and hydropower (1%).", "Nigeria's primary energy consumption was about 108 Mtoe in 2011. Most of the energy comes from traditional biomass and waste, which account for 83% of total primary production. The rest is from fossil fuels (16%) and hydropower (1%).", "Nigeria's primary energy consumption was about 108 Mtoe in 2011. Most of the energy comes from traditional biomass and waste, which account for 83% of total primary production. The rest is from fossil fuels (16%) and hydropower (1%)."]}}]}, {'provenance': [{'wikipedia_id': '2338314', 'title': "African Petroleum Producers' Organization", 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['African Petroleum Producers Organization (APPO) ("Organisation Africaine des Producteurs Pétroliers" in French, "Organização dos Produtores Africanos de Petróleo" in Portuguese and "المنظمة الأفريقية لمنتجي البترول" in Arabic) is an organization of African countries producing petroleum. It was created on January 27, 1987 in Lagos, Nigeria, to serve as a platform for cooperation and harmonization of efforts, collaboration, sharing of knowledge and skills among African oil producing countries. The headquarters of the organization is in Brazzaville in the Congo. The Organization changed its name from African Petroleum Producers Association to African Petroleum Producers Organization in 2017.', 'African Petroleum Producers Organization (APPO) ("Organisation Africaine des Producteurs Pétroliers" in French, "Organização dos Produtores Africanos de Petróleo" in Portuguese and "المنظمة الأفريقية لمنتجي البترول" in Arabic) is an organization of African countries producing petroleum. It was created on January 27, 1987 in Lagos, Nigeria, to serve as a platform for cooperation and harmonization of efforts, collaboration, sharing of knowledge and skills among African oil producing countries. The headquarters of the organization is in Brazzaville in the Congo. The Organization changed its name from African Petroleum Producers Association to African Petroleum Producers Organization in 2017.']}}]}, {'provenance': [{'wikipedia_id': '17968151', 'title': 'Mineral industry of Africa', 'section': 'Section::::Economics.:Organizations promoting exports.\n', 'start_paragraph_id': 11, 'end_paragraph_id': 11, 'meta': {'evidence_span': ['The mineral industry is an important source of export earnings for many African nations. To promote exports, groups of African countries have formed numerous trade blocs, which included the Common Market for Eastern and Southern Africa, the Economic and Monetary Community of Central Africa, the Economic Community of Central African States, the Economic Community of West African States, the Mano River Union, the Southern African Development Community, and the West African Economic and Monetary Union. Algeria, Libya, and Nigeria were members of the Organization of the Petroleum Exporting Countries (OPEC). The African Union was formally launched as a successor to the Organization of African Unity in 2002 to accelerate socioeconomic integration and promote peace, security, and stability on the continent.', 'The mineral industry is an important source of export earnings for many African nations. To promote exports, groups of African countries have formed numerous trade blocs, which included the Common Market for Eastern and Southern Africa, the Economic and Monetary Community of Central Africa, the Economic Community of Central African States, the Economic Community of West African States, the Mano River Union, the Southern African Development Community, and the West African Economic and Monetary Union. Algeria, Libya, and Nigeria were members of the Organization of the Petroleum Exporting Countries (OPEC). The African Union was formally launched as a successor to the Organization of African Unity in 2002 to accelerate socioeconomic integration and promote peace, security, and stability on the continent.\rhighlight sentence(s) containing evidence, not only the answer']}}]}]