Complex sentence: The Via Panisperna boys was a group of young scientists led by Enrico Fermi who, in 1934 in Rome, made the famous discovery of slow neutrons that opened the way to the realization of the nuclear reactor and the atomic bomb.
Split into simpler sentences: The Via Panisperna boys were a group of young scientists led by Enrico Fermi. In 1934, in Rome, they made the famous discovery of slow neutrons which opened the way to the realization of the nuclear reactor and the atomic bomb.