Complex sentence: From 1996 to 1998, Roosevelt was a vice president at the Center for Blood Research, a basic research institution affiliated with the Harvard Medical School, funded by Federal grants mostly by NIH and focusing on immunological research.
Split into simpler sentences: From 1996 to 1998, Roosevelt was a vice president at the Center for Blood Research. The Center for Blood Research is a basic research institution affiliated with the Harvard Medical School, funded by Federal grants mostly by NIH and focusing on immunological research.