Complex sentence: Sinclair and FOX cut a six-year affiliation contract extension for Sinclair's 19 FOX affiliates; thus, FOX will remain on WPGH at least through March 2012.
Split into simpler sentences: Sinclair and FOX cut a six-year affiliation contract extension for Sinclair's 19 FOX affiliates. As a result, FOX will remain on WPGH through at least March 2012.