A person may order a subscription.Logical formLearned from18 sentences. An (e-mail subscription) may pertain-to a person.Logical formLearned from18 sentences. A (pass subscription) can be monthly.Logical formLearned from18 sentences. A subscription can be valid.Logical formLearned from18 sentences. A person may want a subscription.Logical formLearned from18 sentences. A (subscription service) may pertain-to a company.Logical formLearned from18 sentences. Subscriptions may pertain-to a company.Logical formLearned from18 sentences. Subscription may fizzle.Logical formLearned from18 sentences. A subscription can be yearlong.Logical formLearned from18 sentences. A (subscription address) may pertain-to a person.Logical formLearned from18 sentences. Subscription can be to a list.Logical formLearned from18 sentences. A subscription can be to a database.Logical formLearned from17 sentences. A subscription may undergo an expiration.Logical formLearned from17 sentences. (Subscription databases) can be online.Logical formLearned from17 sentences. A subscription can be to a feed.Logical formLearned from17 sentences.