Premise: Colin Francis Weeber Isaacs (born 1953) is a former politician in Ontario, Canada. He was a New Democratic Party member in the Legislative Assembly of Ontario representing the riding of Wentworth from 1979 to 1981. He works as an environmental consultant and journalist and publishes the Gallon Newsletter.
Hypothesis: Colin Francis Weeber Isaacs represented the riding of Wentworth starting from 1979 and then ending on 1981