Q:Facts: - death place: waynesville , north carolina , u.s. - resting place: green hill cemetery waynesville , north carolina , u.s. - caption: the greer is in the driver seat . agent roy kellerman presidential was in the front passenger seat . limousine shortly before kennedy 's assassination . - birth name: william robert greer - death cause: cancer - death date: 23 february 1985 - birth date: 22 september 1909 - name: william greer - image: john f. kennedy motorcade , dallas crop.png - birth place: stewartstown , county tyrone , ireland Based on these bullet points, write a short biography describing the life of william greer .
A:
william robert greer -lrb- september 22 , 1909 -- february 23 , 1985 -rrb- was an agent of the u.s. secret service , best known for having driven president john f. kennedy 's automobile in the motorcade through dealey plaza in dallas on november 22 , 1963 , when the president was assassinated .