A singer may pertain-to a smile.Logical formLearned from12 sentences. A singer can be for a group.Logical formLearned from12 sentences. A service may pertain-to a singer.Logical formLearned from12 sentences. (Band wings) may pertain-to a singer.Logical formLearned from12 sentences. Classics can be by a singer.Logical formLearned from12 sentences. A singer can be ugly.Logical formLearned from12 sentences. Singer may offer audiences of a concert a refund.Logical formLearned from12 sentences. A singer can be at a concert.Logical formLearned from12 sentences. A person can be a singer of a band.Logical formLearned from12 sentences. A back may pertain-to a singer.Logical formLearned from12 sentences. A (male singer) may pertain-to a person.Logical formLearned from12 sentences. A female may sing with a singer.Logical formLearned from12 sentences. A singer may spend some years.Logical formLearned from12 sentences. A delivery may pertain-to a singer.Logical formLearned from12 sentences. Singers can be brilliant.Logical formLearned from12 sentences.