Complex sentence: KCSB was the flagship station of the local TV network Inland California Television Network, a partnership between California State University, San Bernardino, the City of San Bernardino and about 20 other surrounding cities.
Split into simpler sentences: KCSB was the flagship station of the local TV network ICTN (Inland California Television Network). ICTN was a partnership between California State University, San Bernardino, the City of San Bernardino, and about 20 other surrounding cities.