Complex sentence: At this time, Manhattan had long been the epicenter of publishing design during the latter-twentieth century, and this new commercial-art-dedicated satellite was modeled to apply intensely concentrated vocational training in graphic design, illustration, package design, and textile design.
Split into simpler sentences: At this time, Manhattan had long been the epicenter of publishing design during the latter-twentieth century. This new commercial-art-dedicated satellite was modeled to apply intensely concentrated vocational training in graphic design, illustration, package design, and textile design.