Some spacecraft may fly in a polar orbit.Logical formLearned from3 sentences. A spacecraft may identify some candidates.Logical formLearned from3 sentences. A spacecraft may undergo failures.Logical formLearned from3 sentences. An engine may pertain-to a spacecraft.Logical formLearned from3 sentences. A spacecraft can be in an orbit.Logical formLearned from3 sentences. Speed may pertain-to a spacecraft.Logical formLearned from3 sentences. Spacecraft can be common.Logical formLearned from3 sentences. A spacecraft can be sentient.Logical formLearned from3 sentences. Contact can be with a spacecraft.Logical formLearned from3 sentences. A spacecraft may be designed by a male.Logical formLearned from3 sentences. A spacecraft may be obtained.Logical formLearned from3 sentences. A spacecraft may encounter a lunar surface with an asymptotic direction.Logical formLearned from3 sentences. Astronauts can be in a spacecraft.Logical formLearned from3 sentences. An object can be a spacecraft.Logical formLearned from3 sentences. A spacecraft may spend some days.Logical formLearned from3 sentences.