CREATE TABLE table_48325 ("Name" TEXT, "Party" TEXT, "Tenure" TEXT, "Head ( s )  of Government" TEXT, "Ministerial title" TEXT)

What is the head of government for Don Stephen Senanayake?
SELECT "Head(s) of Government" FROM table_48325 WHERE "Name" = 'don stephen senanayake'
SELECT "Head(s) of Government" FROM "table_48325" WHERE "Name" = 'don stephen senanayake'