Complex sentence: However, only one (November 18,1953) is from the DuMont series, with the others from the earlier ABC series "Personal Appearance Theatre" (1951-52), which may have also aired on DuMont stations.
Split into simpler sentences: However, only one (November 18,1953) is from the DuMont series. The others are from the earlier ABC series "Personal Appearance Theatre" (1951-52), which may have also aired on DuMont stations.