Query: In what year did Sharif become CM?
Context: The Chief Minister of Punjab (CM) is elected by the Provincial Assembly of the Punjab to serve as the head of the provincial government in Punjab, Pakistan. The current Chief Minister is Shahbaz Sharif, who became the Chief Minister of Punjab as being restored after Governor's rule starting from 25 February 2009 to 30 March 2009. Thereafter got re-elected as a result of 11 May 2013 elections.