Machine Learning, Naturallanguageprocessing, NLP, Bots.
example feature: ƒ1(c,d) ≡ [ c = LOCATION & w-1=”in” & isCapitalized(w) ] This feature picks out from the data cases where the class is LOCATION, the previous word is “in” and the current word is capitalized. This feature would match the following scenarios: class = LOCATION, data = “in Quebec”