 Complete the following phrase:  From 1988 to 1993, the power struggle between the Prime Minister and Presidency continued with President dismissing the National Assembly on three different occasions. At the 1997 elections, the PMLN secured a two-thirds majority in the Parliament and drafted the XIII and XIV Amendments to reverse the eighth amendment to the Constitution; this allowed Nawaz Sharif to centralize more executive powers. After the draw down of civil-military relations in 1999, Chairman joint chiefs General Pervez Musharraf staged 