Complex sentence: The name change was often subverted by the Armed Forces Radio Network; when the AFRN rebroadcast those episodes for U.S. servicemen during World War II, the announcer referred to "Duffy's Tavern".
Split into simpler sentences: The name change was often subverted by the Armed Forces Radio Network. When the AFRN rebroadcast those episodes for U.S. servicemen during World War II, the announcer referred to "Duffy's Tavern".