A birthday can be simple.Logical formLearned from31 sentences. A birthday can be an occasion.Logical formLearned from31 sentences. A request can be for a (birthday shout-out).Logical formLearned from31 sentences. A birthday can be uneventful.Logical formLearned from31 sentences. Persons may celebrate birthdays.Logical formLearned from31 sentences. A birthday can be on a 7th.Logical formLearned from31 sentences. Candles can be on a (birthday cake).Logical formLearned from31 sentences. A (birthday girl) may pertain-to persons.Logical formLearned from31 sentences. Tonight can be (birthday party).Logical formLearned from31 sentences. A (birthday song) may pertain-to a person.Logical formLearned from31 sentences. Some days can be a birthday.Logical formLearned from31 sentences. Days can be after a birthday.Logical formLearned from31 sentences. A person may buy for a birthday.Logical formLearned from31 sentences. A female may celebrate a birthday.Logical formLearned from31 sentences. A birthday may pertain-to a co-worker.Logical formLearned from31 sentences.