Students may sign_up in room.Logical formLearned from4 sentences. A person may sign_up voters.Logical formLearned from4 sentences. Individuals may sign_up for insurance.Logical formLearned from4 sentences. Families may sign_up for committees.Logical formLearned from4 sentences. A person may sign_up by phone.Logical formLearned from4 sentences. Persons may sign_up for service.Logical formLearned from4 sentences. A person may sign_up for (mailing lists).Logical formLearned from4 sentences. Families may sign_up children.Logical formLearned from4 sentences. Students may sign_up for a study.Logical formLearned from4 sentences. Users may sign_up for alerts.Logical formLearned from4 sentences. Readers may sign_up for alerts.Logical formLearned from4 sentences. A person may sign_up for an online course.Logical formLearned from4 sentences. Users may sign_up for newsletter.Logical formLearned from4 sentences. A person may sign_up for credit.Logical formLearned from4 sentences. Some families may be sign_uped.Logical formLearned from4 sentences.