Complex sentence: In 2014, Pishever responded to Elon Musk's challenge to build a hyperloop, which Musk presented in a whitepaper titled "Hyperloop Alpha", and in late 2014 Pishevar and Brogan BamBrogan co-founded Hyperloop One, formerly Hyperloop Technologies.
Split into simpler sentences: In 2014, Pishever responded to Elon Musk's challenge to build a hyperloop, which Musk presented in a whitepaper titled "Hyperloop Alpha". In late 2014, Pishevar and Brogan BamBrogan co-founded Hyperloop One, formerly Hyperloop Technologies.