A female may sing a time.Logical formLearned from26 sentences. Students may sing a national anthem.Logical formLearned from26 sentences. A male may sing under a breath.Logical formLearned from26 sentences. A song may be sung in a language.Logical formLearned from26 sentences. Seagulls may sing.Logical formLearned from26 sentences. A person may sing loud.Logical formLearned from26 sentences. A male may sing a singer.Logical formLearned from26 sentences. A (cell phone ring tone) may sing.Logical formLearned from26 sentences. A male may sing birthday.Logical formLearned from26 sentences. Cicadas may sing.Logical formLearned from26 sentences. Musicians may sing.Logical formLearned from26 sentences. A male may sing music.Logical formLearned from26 sentences. A person may sing a lead.Logical formLearned from26 sentences. A mother may sing to a person.Logical formLearned from26 sentences. A poet may sing.Logical formLearned from26 sentences.