An unit can be productive.Logical formLearned from63 sentences. A source can be productive.Logical formLearned from62 sentences. A method can be productive.Logical formLearned from62 sentences. Pursuits can be productive.Logical formLearned from62 sentences. Employees can be productive.Logical formLearned from62 sentences. A receiver can be productive.Logical formLearned from62 sentences. Participation can be productive.Logical formLearned from62 sentences. A .. can be productive.Logical formLearned from62 sentences. A (working relationship) can be productive.Logical formLearned from62 sentences. Times can be productive.Logical formLearned from61 sentences. Means can be productive.Logical formLearned from61 sentences. Work can be productive.Logical formLearned from61 sentences. An (age group) can be productive.Logical formLearned from60 sentences. An ecosystem can be productive.Logical formLearned from60 sentences. Mines can be productive.Logical formLearned from60 sentences.