Question: how many countries are a part of opec
[{'answer': '14', 'provenance': [{'wikipedia_id': '166346', 'title': 'OPEC', 'start_paragraph_id': 1, 'start_character': 274, 'end_paragraph_id': 1, 'end_character': 276, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '166346', 'title': 'OPEC', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 567, 'bleu_score': 0.668446034201544, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5586308112400828379}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '166346', 'title': 'OPEC', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['the then 14 member countries accounted for an estimated 44 percent of global oil production and 81.5 percent of the world\'s "proven" oil reserves, giving OPEC a major influence on global oil prices that were previously determined by the so called "Seven Sisters grouping of multinational oil companies.', 'the then 14 member countries accounted for an estimated 44 percent of global oil production and 81.5 percent of the world\'s "proven" oil reserves, giving OPEC a major influence on global oil prices that were previously determined by the so called "Seven Sisters grouping of multinational oil companies.', '14']}}]}, {'provenance': [{'wikipedia_id': '166346', 'title': 'OPEC', 'section': 'Section::::Abstract.', 'start_paragraph_id': 4, 'end_paragraph_id': 4, 'meta': {'evidence_span': ['In December 2014, "OPEC and the oil men" ranked as #3 on Lloyd\'s list of "the top 100 most influential people in the shipping industry". However, the influence of OPEC on international trade is periodically challenged by the expansion of non-OPEC energy sources, and by the recurring temptation for individual OPEC countries to exceed production targets and pursue conflicting self-interests. As of January 2019, OPEC has 14 member countries:', 'As of January 2019, OPEC has 14 member countries: five in the Middle East (Western Asia), seven', '14']}}]}, {'provenance': [{'wikipedia_id': '15190990', 'title': 'Megacorpstate', 'section': 'Section::::OPEC features.\n', 'start_paragraph_id': 13, 'end_paragraph_id': 13, 'meta': {'evidence_span': ['As of May 2017, the organization consists of 14 countries which earn the majority of their income through oil revenues: Algeria, Angola, Ecuador, Equatorial Guinea, Gabon, Iran, Iraq, Kuwait, Libya, Nigeria, Qatar, Saudi Arabia (the dominant exporter), United Arab Emirates, Venezuela. According to OPEC, membership is open to any nation that has substantial oil resource and observes the same principles as the organization, subject to approval by the member governments.', 'As of May 2017, the organization consists of 14 countries which earn the majority of their income through oil revenues', '14']}}]}]