A blazar can be active.Logical formLearned from3 sentences. (Iron k-lines) can be in active galactic nuclei.Logical formLearned from3 sentences. A service may remain active.Logical formLearned from3 sentences. Older persons may remain active.Logical formLearned from3 sentences. Order can be to active duty.Logical formLearned from3 sentences. An aviator can be on active duty.Logical formLearned from3 sentences. Active components can be constituted-of-or-filled-with treatment.Logical formLearned from3 sentences. A male can be an active member of a society.Logical formLearned from3 sentences. Maintenance of riparian vegetation may require active management.Logical formLearned from3 sentences. Days can be active.Logical formLearned from3 sentences. A breadwinner may be called to active duty.Logical formLearned from3 sentences. Individuals may serve on active duty.Logical formLearned from3 sentences. A person may serve in active duty.Logical formLearned from3 sentences. Persons can be active members.Logical formLearned from3 sentences. Active regions may appear.Logical formLearned from3 sentences.