A weekend may celebrate a birthday.Logical formLearned from71 sentences. A (birthday party) may pertain-to a grandmother.Logical formLearned from71 sentences. A writer may undergo a birthday.Logical formLearned from71 sentences. A life may undergo a birthday.Logical formLearned from71 sentences. A birthday can be on a day.Logical formLearned from71 sentences. A (birthday party) can be at a store.Logical formLearned from70 sentences. A birthday may pertain-to a roommate.Logical formLearned from70 sentences. A birthday can be nice.Logical formLearned from70 sentences. A male can be on a birthday.Logical formLearned from70 sentences. A birthday may pertain-to a person.Logical formLearned from70 sentences. (Birthday gifts) may pertain-to a male.Logical formLearned from69 sentences. A person may go to a birthday.Logical formLearned from69 sentences. Some days can be until a birthday.Logical formLearned from69 sentences. (Birthday gifts) may pertain-to a female.Logical formLearned from69 sentences. A male may attend a (birthday party).Logical formLearned from68 sentences.