A male may sing for a female.Logical formLearned from31 sentences. A person may sing bass.Logical formLearned from31 sentences. A male may sing a ballad.Logical formLearned from31 sentences. A male may sing for persons.Logical formLearned from31 sentences. A female may sing a version.Logical formLearned from31 sentences. Persons may sing a lot.Logical formLearned from31 sentences. Lyrics may be sung.Logical formLearned from31 sentences. Voices may sing.Logical formLearned from31 sentences. A crowd may sing.Logical formLearned from31 sentences. A word may be sung.Logical formLearned from30 sentences. A female may sing lines.Logical formLearned from30 sentences. A male may sing in a country.Logical formLearned from30 sentences. Persons may sing songs.Logical formLearned from30 sentences. Some girls may sing.Logical formLearned from30 sentences. Whales may sing.Logical formLearned from30 sentences.