A standard can be valid.Logical formLearned from32 sentences. A header can be valid.Logical formLearned from32 sentences. A call can be valid.Logical formLearned from32 sentences. A match can be valid.Logical formLearned from32 sentences. An offer may remain valid.Logical formLearned from32 sentences. Programs can be valid.Logical formLearned from31 sentences. An (email account) can be valid.Logical formLearned from31 sentences. A content can be valid.Logical formLearned from31 sentences. Sites can be valid.Logical formLearned from31 sentences. An url can be valid.Logical formLearned from31 sentences. An union can be valid.Logical formLearned from31 sentences. Fears can be valid.Logical formLearned from31 sentences. A lease can be valid.Logical formLearned from31 sentences. Agreements can be valid.Logical formLearned from31 sentences. Marriages can be valid.Logical formLearned from31 sentences.