Question: What number prime minister of Canada chaired the Twenty-Eighth Canadian Ministry?
Sentence (from "Stephen Harper"): Stephen Joseph Harper {'1': ", '2': ", '3': ", '4': "} (born April 30, 1959) is a Canadian entrepreneur and retired politician who served as the 22nd Prime Minister of Canada, from February 6, 2006 to November 4, 2015.
Relevant evidence: Yes