Complex sentence: By 2015, Petersen was living in Kansas City, Missouri "behind a midtown QuikTrip" when he announced his candidacy in the 2016 Libertarian Party nominating convention for president of the United States.
Split into simpler sentences: By 2015, Petersen was living in Kansas City, Missouri, "behind a midtown QuikTrip". That year he announced his candidacy in the 2016 Libertarian Party nominating convention for president of the United States.