Complex sentence: In May 2006, KPIX moved its San Jose news bureau to the Fairmont Tower at 50 W. San Fernando Street--which served as the original site of Charles Herrold's experimental radio broadcasts that were the precursor of KCBS.
Split into simpler sentences: In May 2006 KPIX moved its San Jose news bureau to the Fairmont Tower at 50 W. San Fernando Street. This was the original site of Charles Herrold's experimental broadcasts which were the precursor of KCBS.