A cusp may pertain-to a birthday.Logical formLearned from22 sentences. Persons may have (birthday parties).Logical formLearned from22 sentences. Flowers can be on a birthday.Logical formLearned from22 sentences. A (birthday party) may be held in a (pool area).Logical formLearned from22 sentences. A crowd may sing birthday.Logical formLearned from22 sentences. Months can be shy of a birthday.Logical formLearned from22 sentences. A (birthday party) may pertain-to a month.Logical formLearned from22 sentences. A (weekend birthday party) can be lavish.Logical formLearned from22 sentences. A female may sing birthday to a president.Logical formLearned from22 sentences. An international-political-entity may celebrate a birthday.Logical formLearned from22 sentences. A male may be knighted in a birthday.Logical formLearned from21 sentences. Celebrations can be for a birthday.Logical formLearned from21 sentences. A night can be a birthday.Logical formLearned from21 sentences. Persons may wish a person a birthday.Logical formLearned from21 sentences. A birthday may come_up in days.Logical formLearned from21 sentences.