A person may need a piano.Logical formLearned from10 sentences. A piano may be invented.Logical formLearned from10 sentences. A male may sit_down at a piano.Logical formLearned from10 sentences. A (piano solo) can be by a male.Logical formLearned from10 sentences. A (piano teacher) can be in a park.Logical formLearned from10 sentences. A singer may be seated at a piano.Logical formLearned from10 sentences. A piano can be on a back.Logical formLearned from10 sentences. (Piano concertos) may undergo performances.Logical formLearned from10 sentences. A (piano teacher) may pertain-to a son.Logical formLearned from10 sentences. Black keys may pertain-to a piano.Logical formLearned from10 sentences. (Piano students) may pertain-to a female.Logical formLearned from10 sentences. A cycle may pertain-to (piano sonatas).Logical formLearned from10 sentences. A piano can be battered.Logical formLearned from10 sentences. A female may receive (piano lessons).Logical formLearned from10 sentences. A person may want a piano.Logical formLearned from10 sentences.