A commercial jet may undergo a crash.Logical formLearned from11 sentences. An (air force plane) may undergo a crash.Logical formLearned from11 sentences. Drivers may be involved in a crash.Logical formLearned from11 sentences. Circumstances may surround a crash.Logical formLearned from11 sentences. Aircraft may head to a (crash site).Logical formLearned from11 sentences. Zairians may mourn victims of a (plane crash).Logical formLearned from11 sentences. (Rescue officials) can be at a (crash site).Logical formLearned from11 sentences. Some persons may be killed in some crash.Logical formLearned from11 sentences. A president can be in a (plane crash).Logical formLearned from11 sentences. A person may go to a (crash site).Logical formLearned from11 sentences. Persons may be killed in an (oil company plane crash).Logical formLearned from11 sentences. Charge may pertain-to a (crash investigation).Logical formLearned from11 sentences. A crash may bring unity to a scene.Logical formLearned from11 sentences. Causes can be behind a crash.Logical formLearned from11 sentences. A polish president may be killed in a (plane crash).Logical formLearned from11 sentences.