Complex sentence: King was elected Vice President of the United States on the Democratic ticket with Franklin Pierce in 1852 and took the oath of office on March 24,1853, in Cuba, twenty days after he became Vice President.
Split into simpler sentences: King was elected Vice President of the United States on the Democratic ticket with Franklin Pierce in 1852. He took the oath of office on March 24,1853 in Cuba, twenty days after he became Vice President.