Complex sentence: Frisch and Peierls reported to their professor Mark Oliphant who informed Henry Tizard who in April 1940 formed a top-secret committee of experts (later known as the MAUD Committee) to investigate the feasibility of an atomic bomb.
Split into simpler sentences: Frisch and Peierls reported to their professor Marcus Oliphant who informed Henry Tizard. In April 1940 Tizard formed a top-secret committee of experts (later known as the MAUD Committee) to investigate the feasibility of an atomic bomb.