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Comparing the MRP strict consensus with the majority-rule (+) supertree. Left: The strict consensus of the most parsimonious trees obtained by Kennedy and Page for their seabirds data set [17]. Right: The majority-rule (+) supertree obtained by using the data reduction heuristic; the reducible sets used to construct it are indicated by heavy lines. Clusters that appear in one tree but not the other are numbered; the differences are explained in the text.
