Complex sentence: Texas State Highway 121, locally known as Texas 121, is a diagonal state highway, angling from southwest to northeast through north-central Texas from downtown Fort Worth, Texas, junction Interstate 35W to Bonham, Texas, just north of junction U.S. Highway 82.
Split into simpler sentences: Texas State Highway 121, locally known as 121, is a diagonal state highway, angling from southwest to northeast through north central Texas. It runs from downtown Fort Worth, Texas at the junction of Interstate 35W to Bonham, Texas, just north of a junction with U.S. Highway 82.