A person may sing to a male.Logical formLearned from159 sentences. A person may sing to a female.Logical formLearned from154 sentences. A person may sing to him-or-herself.Logical formLearned from154 sentences. A man may sing.Logical formLearned from152 sentences. A male may sing a national anthem.Logical formLearned from150 sentences. A person may sing in a choir.Logical formLearned from149 sentences. Some persons may sing.Logical formLearned from149 sentences. A male may sing in a choir.Logical formLearned from148 sentences. Children may sing.Logical formLearned from148 sentences. A person may sing a female.Logical formLearned from148 sentences. A person may sing some songs.Logical formLearned from147 sentences. A male may sing vocals.Logical formLearned from146 sentences. A bird may sing.Logical formLearned from145 sentences. A person may sing blues.Logical formLearned from141 sentences. A person may sing a person a song.Logical formLearned from140 sentences.