A concussion can be sustained.Logical formLearned from8 sentences. A person may suffer concussions.Logical formLearned from8 sentences. Concussions can be during a career.Logical formLearned from8 sentences. A person may have a concussion.Logical formLearned from8 sentences. A person may have (concussion symptoms).Logical formLearned from8 sentences. A concussion can be fatal.Logical formLearned from8 sentences. Research can be into concussions.Logical formLearned from8 sentences. Concussions can be on a field.Logical formLearned from8 sentences. Players can be with concussions.Logical formLearned from8 sentences. Concussions may have effects.Logical formLearned from8 sentences. An aspect of concussions can be a silence.Logical formLearned from8 sentences. Questions can be about handling of concussions.Logical formLearned from8 sentences. A month can be with a concussion.Logical formLearned from8 sentences. Concussions can be among players.Logical formLearned from8 sentences. A concussion can be in some seasons.Logical formLearned from8 sentences.