A concussion can be in a practice.Logical formLearned from6 sentences. A concussion can be bad.Logical formLearned from6 sentences. (Team trainers) may deal with concussions.Logical formLearned from6 sentences. A person may sustain some concussions.Logical formLearned from6 sentences. A concussion can be an injury to a brain.Logical formLearned from6 sentences. Concussions can be violent.Logical formLearned from6 sentences. A stretcher can be with a concussion.Logical formLearned from6 sentences. Some concussions can be in some days.Logical formLearned from6 sentences. Gunmen may throw (concussion grenades).Logical formLearned from6 sentences. Explosions may undergo a concussion.Logical formLearned from6 sentences. A groan can be constituted-of-or-filled-with concussion.Logical formLearned from6 sentences. A pilot may feel some concussion.Logical formLearned from6 sentences. A concussion can be delayed.Logical formLearned from6 sentences. A concussion can be last.Logical formLearned from6 sentences. A line can be constituted-of-or-filled-with concussions.Logical formLearned from6 sentences.