Concussions can be a sign of frustration.Logical formLearned from10 sentences. Concussions can be resounding.Logical formLearned from10 sentences. A person may suffer a concussion.Logical formLearned from10 sentences. Damage may be caused by a concussion.Logical formLearned from10 sentences. Concussions can be at a forefront of problems.Logical formLearned from10 sentences. Football may produce some concussions.Logical formLearned from10 sentences. A concussion may knock a male.Logical formLearned from10 sentences. Cases can be constituted-of-or-filled-with concussion.Logical formLearned from10 sentences. A concussion can be in practice.Logical formLearned from10 sentences. A player may sustain a concussion.Logical formLearned from10 sentences. A player may have a concussion.Logical formLearned from10 sentences. A concussion can be during training.Logical formLearned from10 sentences. A hit may cause a concussion.Logical formLearned from10 sentences. Some concussions can be in some starts.Logical formLearned from10 sentences. A coach may suffer concussion.Logical formLearned from10 sentences.