Complex sentence: Its longest and most well-known run, however, is the one on the DuMont Television Network from July 6,1951 to May 30,1954; during this time, original host Bill Slater was replaced by Jay Jackson.
Split into simpler sentences: Its longest and most well-known run, however, is the one on the DuMont Television Network from July 6,1951 to May 30,1954. During this time, original host Bill Slater was replaced by Jay Jackson.