Complex sentence: Poly-paraphenylene terephthalamide--branded Kevlar--was invented by Stephanie Kwolek while working for DuPont, in anticipation of a gasoline shortage, in 1964 her group began searching for a new lightweight strong fiber to use for light but strong tires.
Split into simpler sentences: Poly-paraphenylene terephthalamide--branded Kevlar--was invented by Stephanie Kwolek while working for DuPont, in anticipation of a gasoline shortage. In 1964, her group began searching for a new lightweight strong fiber to use for light but strong tires.