A dialog may have a (subscribe usage).Logical formLearned from4 sentences. A (header field) may pertain-to a (subscribe request).Logical formLearned from4 sentences. A person may send a (subscribe command).Logical formLearned from4 sentences. A person may be subscribed to a calendar.Logical formLearned from4 sentences. A person may subscribe to publications.Logical formLearned from4 sentences. A person may subscribe to a forum.Logical formLearned from4 sentences. A male may subscribe to a journal.Logical formLearned from4 sentences. A person may subscribe to groups.Logical formLearned from4 sentences. Some customers may subscribe to digital cable.Logical formLearned from4 sentences. A library may subscribe to some e-journals.Logical formLearned from4 sentences. A male may subscribe to commands.Logical formLearned from4 sentences. Everyone may be subscribed to a (mailing list).Logical formLearned from4 sentences. A person may subscribe to emails.Logical formLearned from4 sentences. Persons may subscribe to some titles.Logical formLearned from4 sentences. A person may be subscribed to feeds.Logical formLearned from4 sentences.