(Gem exports) may pertain-to a country.Logical formLearned from2 sentences. Sale of gems may follow at a weekend.Logical formLearned from2 sentences. Gems can be in the future.Logical formLearned from2 sentences. A gem can be for a world-city.Logical formLearned from2 sentences. Some exporters can be constituted-of-or-filled-with gems.Logical formLearned from2 sentences. Gems can be a product of trade.Logical formLearned from2 sentences. Gems can be a sector.Logical formLearned from2 sentences. A (gem trade center) can be in a capital.Logical formLearned from2 sentences. A (gem market) can be in a country.Logical formLearned from2 sentences. A demand can be for gems.Logical formLearned from2 sentences. Some percent of diamonds can be of (gem quality).Logical formLearned from2 sentences. A company may recover (gem quality diamonds) off a coast.Logical formLearned from2 sentences. A (gem miner) may pertain-to a country.Logical formLearned from2 sentences. A (joint-venture agreement) can be with a (gem miner).Logical formLearned from2 sentences. Supplies can be constituted-of-or-filled-with gems.Logical formLearned from2 sentences.