Activities may be based.Logical formLearned from26 sentences. A society may be based on freedom.Logical formLearned from26 sentences. Programs may be based on plutonium.Logical formLearned from26 sentences. Operations may be based in a world-city.Logical formLearned from26 sentences. A leader may be based in a world-city.Logical formLearned from25 sentences. Units may be based in a country.Logical formLearned from25 sentences. An index may be based on data.Logical formLearned from25 sentences. A filmmaker may be based in a US-city.Logical formLearned from25 sentences. A football may be based in a world-city.Logical formLearned from25 sentences. An association may be based in a world-city.Logical formLearned from25 sentences. Some aircrafts may be based.Logical formLearned from25 sentences. An institution may be based in a world-city.Logical formLearned from25 sentences. Some film may be based on some novel.Logical formLearned from25 sentences. Work may be based on a premise.Logical formLearned from25 sentences. An event may be based.Logical formLearned from25 sentences.