A nation may produce oil.Logical formLearned from11 sentences. (Nerve cells) may produce dopamine.Logical formLearned from11 sentences. Operations may produce results.Logical formLearned from11 sentences. Some percent of electricity may be produced in the north.Logical formLearned from11 sentences. Tea may be produced.Logical formLearned from11 sentences. A visit may produce positive results.Logical formLearned from11 sentences. Goods may be produced in poor countries.Logical formLearned from11 sentences. A country may produce some tons of coffee.Logical formLearned from11 sentences. A country may produce some automobiles.Logical formLearned from11 sentences. Some drama may be produced by a male.Logical formLearned from11 sentences. A month may be produced.Logical formLearned from11 sentences. Executive may be produced by a person.Logical formLearned from11 sentences. Some singles may be produced by a male.Logical formLearned from11 sentences. Lines may be produced.Logical formLearned from11 sentences. (Hydrogen gas) may be produced.Logical formLearned from11 sentences.