With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Canada has a diverse climate. The climate varies from temperate on the west coast of British Columbia to a subarctic climate in the north. Extreme northern Canada can have snow for most of the year with a Polar climate. Landlocked areas tend to have a warm summer continental climate zone with the exception of Southwestern Ontario which has a hot summer humid continental climate. Parts of Western Canada have a semi-arid climate, and parts of Vancouver Island can even be classified as a warm-summer Mediterranean climate. Temperature extremes in Canada range from in Midale and Yellow Grass, Saskatchewan, on 5 July 1937, to in Snag, Yukon, on 3 February 1947.
text_B: Would you expect to see more people in Southwestern Ontario wearing shorts in the summer than in any other Ontario region?
YES.