A person may sign_up a female.Logical formLearned from122 sentences. A person may sign_up for twitter.Logical formLearned from107 sentences. A person may sign_up for a website.Logical formLearned from106 sentences. A person may sign_up for a course.Logical formLearned from101 sentences. A person may sign_up for a plan.Logical formLearned from98 sentences. Persons may be sign_uped.Logical formLearned from96 sentences. A person may sign_up for a service.Logical formLearned from96 sentences. A person may sign_up for a program.Logical formLearned from96 sentences. A person may sign_up for a (mailing list).Logical formLearned from95 sentences. A person may sign_up that something-is-the-case.Logical formLearned from94 sentences. A person may sign_up persons.Logical formLearned from90 sentences. A person may sign_up on a website.Logical formLearned from88 sentences. A person may sign_up on a site.Logical formLearned from86 sentences. A person may sign_up for some classes.Logical formLearned from85 sentences. A person may sign_up for a course.Logical formLearned from84 sentences.