A (research program) can be productive.Logical formLearned from73 sentences. Stuff can be productive.Logical formLearned from73 sentences. An outcome can be productive.Logical formLearned from73 sentences. A capability can be productive.Logical formLearned from73 sentences. Waters can be productive.Logical formLearned from73 sentences. Teams can be productive.Logical formLearned from72 sentences. Loans can be productive.Logical formLearned from72 sentences. Sessions can be productive.Logical formLearned from72 sentences. A group can be productive.Logical formLearned from72 sentences. Plants can be productive.Logical formLearned from70 sentences. A performance can be productive.Logical formLearned from70 sentences. Yesterday can be productive.Logical formLearned from70 sentences. An atmosphere can be productive.Logical formLearned from69 sentences. Productive forces may undergo a (development trend).Logical formLearned from68 sentences. A fashion can be productive.Logical formLearned from68 sentences.