A collision may block a waterway.Logical formLearned from4 sentences. A collision may create debris.Logical formLearned from4 sentences. A (satellite collision) can be fresh on minds.Logical formLearned from4 sentences. A collision may offer an opportunity.Logical formLearned from4 sentences. A collision may create clouds of debris.Logical formLearned from4 sentences. Some satellites can be vulnerable to collisions.Logical formLearned from4 sentences. Fragments may trigger a chain of collisions.Logical formLearned from4 sentences. A collision may occur some miles.Logical formLearned from4 sentences. A collision may shut_down some engines.Logical formLearned from4 sentences. (Traffic controllers) may place some (flight crews) on a (collision course).Logical formLearned from4 sentences. A collision can be between (championship rivals).Logical formLearned from4 sentences. A collision may display a red light.Logical formLearned from4 sentences. A collision may occur at a curve.Logical formLearned from4 sentences. A collision can be at an airport.Logical formLearned from4 sentences. A collision can be at a (street intersection).Logical formLearned from4 sentences.