A spacecraft may be vanished.Logical formLearned from4 sentences. A spacecraft may keep on going.Logical formLearned from4 sentences. A spacecraft can be improbable.Logical formLearned from4 sentences. A (progress spacecraft) can be unmanned.Logical formLearned from4 sentences. A spacecraft can be healthy.Logical formLearned from4 sentences. An (observer spacecraft) can be solar.Logical formLearned from4 sentences. A spacecraft can be bigger.Logical formLearned from4 sentences. A spacecraft may bring samples of rock.Logical formLearned from4 sentences. Spacecraft can be in 1970s.Logical formLearned from4 sentences. A spacecraft can be scrappy.Logical formLearned from4 sentences. Some spacecraft may be guided by computers.Logical formLearned from4 sentences. An (air base) may house alien spacecraft.Logical formLearned from4 sentences. A person may take control of a spacecraft.Logical formLearned from4 sentences. Landings of some spacecraft can be successes.Logical formLearned from4 sentences. A spacecraft may undergo landings.Logical formLearned from4 sentences.