A japanese emperor may undergo a birthday.Logical formLearned from25 sentences. A birthday may end.Logical formLearned from25 sentences. Celebrations may mark a birthday.Logical formLearned from25 sentences. A retirement can be on a birthday.Logical formLearned from24 sentences. A birthday can be a celebration.Logical formLearned from24 sentences. An author may undergo a birthday.Logical formLearned from24 sentences. A (birthday bash) can be lavish.Logical formLearned from24 sentences. A birthday may pertain-to a town.Logical formLearned from24 sentences. Birthdays may pertain-to a family.Logical formLearned from24 sentences. A digital camera can be for a birthday.Logical formLearned from24 sentences. A (birthday present) can be for him-or-herself.Logical formLearned from24 sentences. Businesses may offer (birthday discounts).Logical formLearned from24 sentences. A song may pertain-to a birthday.Logical formLearned from24 sentences. Youths may clash at a (birthday party).Logical formLearned from24 sentences. A male may know a birthday.Logical formLearned from24 sentences.