A robot can be sad.Logical formLearned from44 sentences. Statistics can be sad.Logical formLearned from44 sentences. A phenomenon can be sad.Logical formLearned from43 sentences. An icon can be sad.Logical formLearned from43 sentences. Blue eyes can be sad.Logical formLearned from43 sentences. A face may look sad.Logical formLearned from43 sentences. A house can be sad.Logical formLearned from43 sentences. A revelation can be sad.Logical formLearned from43 sentences. Excuses can be sad.Logical formLearned from42 sentences. A lot of persons can be sad.Logical formLearned from42 sentences. Occasions can be sad.Logical formLearned from42 sentences. Evidence can be sad.Logical formLearned from42 sentences. Clowns can be sad.Logical formLearned from41 sentences. Individuals can be sad.Logical formLearned from41 sentences. A monument can be sad.Logical formLearned from41 sentences.