A year can be sour.Logical formLearned from16 sentences. Wine can be sour.Logical formLearned from16 sentences. A time can be sour.Logical formLearned from16 sentences. A victory can be sour.Logical formLearned from16 sentences. A cherry pie can be sour.Logical formLearned from15 sentences. A friendship can be sour.Logical formLearned from15 sentences. A female may look sour.Logical formLearned from15 sentences. Words can be sour.Logical formLearned from15 sentences. A first date can be sour.Logical formLearned from15 sentences. A male may look sour.Logical formLearned from15 sentences. Variety can be sour.Logical formLearned from15 sentences. A hint can be constituted-of-or-filled-with sour grapes.Logical formLearned from15 sentences. A meeting can be sour.Logical formLearned from15 sentences. Relationships may be gone sour.Logical formLearned from15 sentences. (Mortgage loans) can be sour.Logical formLearned from15 sentences.