A piece can be constituted-of-or-filled-with (birthday cake-yummy).Logical formLearned from38 sentences. A philosopher may undergo a birthday.Logical formLearned from38 sentences. Persons may celebrate birthday.Logical formLearned from38 sentences. (Birthday wishes) can be lovely.Logical formLearned from38 sentences. A (birthday surprise) may pertain-to a person.Logical formLearned from38 sentences. A birthday may pertain-to a mommy.Logical formLearned from38 sentences. A person may wake_up on a birthday.Logical formLearned from38 sentences. Thanks can be for a birthday.Logical formLearned from38 sentences. A bike can be for a birthday.Logical formLearned from38 sentences. A birthday may pertain-to a military-commander.Logical formLearned from38 sentences. Everyone may wish a person birthday.Logical formLearned from38 sentences. Pictures can be from a (birthday party).Logical formLearned from38 sentences. Birthdays may pertain-to boys.Logical formLearned from38 sentences. A birthday can be a 13th.Logical formLearned from37 sentences. A female can be at a (birthday party).Logical formLearned from37 sentences.