title: Economy of Canada
context: The economy of Canada is a highly developed mixed economy with 10th largest GDP by nominal and 16th largest GDP by PPP in the world. As with other developed nations, the country's economy is dominated by the service industry, which employs about three quarters of Canadians.[21] Canada has the fourth highest total estimated value of natural resources, valued at US$33.2 trillion in 2016.[22] It has the world's third largest proven petroleum reserves and is the fourth largest exporter of petroleum. It is also the fourth largest exporter of natural gas. Canada is considered an "energy superpower" due to its abundant natural resources and small population.[23][24][25][26]
question: What is Canada's number one industry?
answers: service