They are only interested when commodity prices are going up, as they were when oil prices went up and Western Canadians were reaping the benefits of world prices and hence we had the National Energy Program imposed by the Liberals, a program that redistributed billions of dollars all across Canada, money that belonged to the producing provinces.
The statement was made by a liberal person.
The statement stated about the National Energy Program imposed by the Liberals that went to Canada but not the producing provinces. The statement is negative against Liberals so they are not Liberals. 
( z1 state :ARG0 ( z2 person :ARG1-of ( z3 liberal ) ) )