Complex sentence: The KXJB-TV mast, located near Galesburg, North Dakota, was the second tallest man-made structure on Earth; at the time, only the KVLY-TV mast in Blanchard is taller, located just 6 miles from the KXJB tower.
Split into simpler sentences: The KXJB-TV mast, located near Galesburg, North Dakota, is the second tallest man-made structure on Earth. Only the KVLY-TV mast in Blanchard is taller, located just 6 miles from the KXJB tower.