Complex sentence: The simple, concrete memorial to President Kennedy dominates a square in downtown Dallas owned by Dallas County, and bordered by Main, Record, Elm and Market Streets, one block east of Dealey Plaza, where Kennedy was assassinated.
Split into simpler sentences: The simple, concrete memorial to President Kennedy dominates a square in downtown Dallas owned by Dallas County. It is bordered by Main, Record, Elm and Market Streets, and is one block east of Dealey Plaza, where Kennedy was assassinated.