Persons may sign_up to a list.Logical formLearned from4 sentences. A person may sign_up for a computer.Logical formLearned from4 sentences. Some spammers may be sign_uped to a site.Logical formLearned from4 sentences. Speakers may sign_up with a (city clerk).Logical formLearned from4 sentences. Voters may be sign_uped without knowledge.Logical formLearned from4 sentences. A person may sign_up for a game.Logical formLearned from4 sentences. A person may be sign_uped for a run.Logical formLearned from4 sentences. A person may sign_up for calc.Logical formLearned from4 sentences. A person may be sign_uped to a website.Logical formLearned from4 sentences. Visitors may sign_up for updates.Logical formLearned from4 sentences. A person may be sign_uped for a race.Logical formLearned from4 sentences. A person may sign_up for a date.Logical formLearned from4 sentences. A person may sign_up for some (entertainment packages).Logical formLearned from4 sentences. Some persons may be sign_uped for an event.Logical formLearned from4 sentences. A person may be sign_uped with a service.Logical formLearned from4 sentences.