A blue diamond can be in a world-city.Logical formLearned from4 sentences. Diamonds may pertain-to a zoo.Logical formLearned from4 sentences. Persons may send a person diamonds of a zoo.Logical formLearned from4 sentences. (Diamond miners) can be small-scale.Logical formLearned from4 sentences. (Diamond mining regions) can be lucrative.Logical formLearned from4 sentences. (Diamond mining regions) may pertain-to a country.Logical formLearned from4 sentences. Control can be over (diamond mining regions).Logical formLearned from4 sentences. Woes can be in a (diamond producer).Logical formLearned from4 sentences. A (diamond exporter) may pertain-to the world.Logical formLearned from4 sentences. A (diamond trade) can be (revenue source).Logical formLearned from4 sentences. (Diamond fields) can be troubled.Logical formLearned from4 sentences. A (diamond monopoly) can be prospecting for diamonds.Logical formLearned from4 sentences. (Diamond sales) can be worldwide.Logical formLearned from4 sentences. Thanks can be to a diamond.Logical formLearned from4 sentences. Black diamonds can be genuine.Logical formLearned from4 sentences.