A producer may pertain-to a singer.Logical formLearned from33 sentences. Voices may pertain-to singers.Logical formLearned from33 sentences. A singer may undergo a trial.Logical formLearned from33 sentences. (Opera singers) can be famous.Logical formLearned from33 sentences. A singer may pertain-to a company.Logical formLearned from33 sentences. A (debut album) can be by singer.Logical formLearned from33 sentences. A singer can be by a writer.Logical formLearned from33 sentences. Persons may have a singer.Logical formLearned from33 sentences. A singer can be a guy.Logical formLearned from33 sentences. Sons may pertain-to a singer.Logical formLearned from33 sentences. A person can be an (opera singer).Logical formLearned from33 sentences. A demand may pertain-to a singer.Logical formLearned from33 sentences. A website may pertain-to a singer.Logical formLearned from33 sentences. A singer may undergo a killing.Logical formLearned from33 sentences. A singer may undergo a search.Logical formLearned from33 sentences.