Complex sentence: In 1999, ABC affiliate WKOW (then owned by the Shockley Communications Corporation) entered into a news share agreement with WMSN, which resulted in Madsion's first nightly prime time newscast, known as "Fox 47 News at 9".
Split into simpler sentences: In 1999, ABC affiliate WKOW (then owned by the Shockley Communications Corporation) entered into a news share agreement with WMSN. This resulted in Madsion's first nightly prime time newscast to debut known as "Fox 47 News at 9".