Complex sentence: In 1986, CBS News brought Kroft back to the United States to become a principal correspondent on a new magazine show called West 57th and Stayed in that position until the program was cancelled in the spring of 1989.
Split into simpler sentences: In 1986, CBS News brought Kroft back to the United States to become a principal correspondent on a new magazine show called "West 57th". He stayed in that position until the program was cancelled in the spring of 1989.