Complex sentence: The first major work by Saarinen, in collaboration with his father, was the General Motors Technical Center in Warren, Michigan, which follows the rationalist design Miesian style, incorporating steel and glass, but with the added accent of panels in two shades of blue.
Split into simpler sentences: The first major work by Saarinen, in collaboration with his father, was the General Motors Technical Center in Warren, Michigan. It follows the rationalist design Miesian style: incorporating steel and glass, but with the added accent of panels in two shades of blue.