Complex sentence: Leslie Miscampbell Frost, PC, CC, QC (September 20 1895--May 4 1973) was a politician in Ontario, Canada, whi served as Premier from May 4,1949 to November 8,1961.
Split into simpler sentences: Leslie Miscampbell Frost, PC, CC, QC (September 20 1895--May 4 1973) was a politician in Ontario, Canada. He was Premier of Ontario from May 4,1949 to November 8,1961.