Complex sentence: Along with WMUR and WCVB, Hearst-Argyle also owns NBC affiliate WNNE in White River Junction, Vermont that serves as a semi-satellite of WPTZ (another NBC affiliate and Hearst-Argyle property).
Split into simpler sentences: Along with WMUR and WCVB, Hearst-Argyle also owns NBC affiliate WNNE. That station is based in White River Junction, Vermont and serves as a semi-satellite of WPTZ (another NBC affiliate and Hearst-Argyle property).