An (antigen test) can be positive.Logical formLearned from9 sentences. Cooperation can be positive.Logical formLearned from9 sentences. A (classroom atmosphere) can be positive.Logical formLearned from9 sentences. A recordkeeping can be positive.Logical formLearned from9 sentences. An environmental test can be positive.Logical formLearned from9 sentences. A situation may look positive.Logical formLearned from9 sentences. (Incentive effects) can be positive.Logical formLearned from9 sentences. Research can be positive.Logical formLearned from9 sentences. Social networks can be positive.Logical formLearned from9 sentences. Financial behaviors can be positive.Logical formLearned from9 sentences. Instincts can be positive.Logical formLearned from9 sentences. An organizational culture can be positive.Logical formLearned from9 sentences. (Account balances) can be positive.Logical formLearned from9 sentences. Cows may test positive.Logical formLearned from9 sentences. A pressurization can be positive.Logical formLearned from9 sentences.