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Answers and rating deltas for

How can I declare this variable if it can be one of three different classes?

Author Votes Δ
beresfordt 2 +2.37
tbodt 2 +0.36
Mark 1 -1.36
D. Ben Knoble 0 -3.93
Last visited: Jan 1, 2016, 11:45:33 PM