Complex sentence: Pantelides first political experience came when he was 3, during his father's congressional campaign in 1986 who lost to former University of Maryland basketball player Tom McMillen in the Democratic primary.
Split into simpler sentences: Pantelides first political experience came when he was 3, during his father's congressional campaign in 1986. John Pantelides lost to former University of Maryland basketball player Tom McMillen in the Democratic primary.