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Question re: example submission

On the Problem Description page, It was stated “The format for the submission file is the building id followed by the five roof material types, with a floating point representation of the probability that each roof type applies to the building.”

But in the example submission, each row contains a value of 0.9 for the concrete_cement column, and zeros for the values of all the other columns. This is very misleading – probabilities should sum to one, so the other columns should have non-zero probabilities that sum to 0.1, instead of zeros.