(Customer service) can be key.Logical formLearned from21 sentences. A country may have customers.Logical formLearned from21 sentences. A customer may be treated.Logical formLearned from21 sentences. Customers may notice that something-is-the-case.Logical formLearned from21 sentences. Eyes may pertain-to customers.Logical formLearned from21 sentences. A person may provide customers.Logical formLearned from21 sentences. Customers can be constituted-of-or-filled-with carriers.Logical formLearned from21 sentences. Persons may find customers.Logical formLearned from21 sentences. A customer may be based.Logical formLearned from21 sentences. Customers may pertain-to brokers.Logical formLearned from21 sentences. Customers can be irritated.Logical formLearned from21 sentences. Throngs can be constituted-of-or-filled-with customers.Logical formLearned from21 sentences. Safety may pertain-to customers.Logical formLearned from21 sentences. Some customers can be without service.Logical formLearned from21 sentences. Some customers may have power.Logical formLearned from21 sentences.