| http://www.w3.org/ns/prov#value | - ury.At the summit, Obama will also highlight millions of dollars in pledges and other support from the NFL, the National Institutes of Health and others to conduct research that could begin to provide answers and improve safety.He, as a parent, is concerned about the safety of his own daughters, said White House communications director Jennifer Palmieri.A concussion is a type of traumatic brain
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