A documentary may follow a (singing group) of senior citizens.Logical formLearned from107 sentences. A person may enjoy singing.Logical formLearned from106 sentences. A person may hear singing.Logical formLearned from106 sentences. A singing may pertain-to a country.Logical formLearned from104 sentences. A style can be constituted-of-or-filled-with singing.Logical formLearned from104 sentences. A singing may stop.Logical formLearned from103 sentences. A singing can be sacred.Logical formLearned from98 sentences. A (singing ability) may pertain-to a female.Logical formLearned from97 sentences. Birds may undergo a singing.Logical formLearned from96 sentences. A (singing career) may pertain-to a person.Logical formLearned from91 sentences. A singing can be off-key.Logical formLearned from91 sentences. A (singing debut) may pertain-to a male.Logical formLearned from89 sentences. A quality may pertain-to a singing.Logical formLearned from89 sentences. A (singing talent) may pertain-to a female.Logical formLearned from88 sentences. A (singing ability) may pertain-to a male.Logical formLearned from86 sentences.