Complex sentence: Alaska's at-large congressman, Democrat Nick Begich, disappeared in a plane crash on October 16,1972; he was re-elected to the House that November, but was declared dead on December 29.
Split into simpler sentences: Alaska's at-large congressman, Democrat Nick Begich, disappeared in a plane crash on October 16,1972. He was re-elected to the House that November, but was declared dead on December 29.