Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:The accuracy of predictions is measured in average precision (AP; equivalently, the area under the precision-recall curve) evaluated based on Sym criteria adopted from [5]: Based on Sym, a hypothesis is accepted (considered as a true positive) if the distance to ground-truth is smaller than 0.
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