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:We use LM-Cut (Helmert and Domshlak 2009) for h, the LM-Count heuristic for ĥ, and the FF-heuristic (ignoring action costs) for d̂.
Category: