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 3 standard MLC benchmarks, as used by other recent approaches (Belanger & McCallum 2016; Gygli et al. 2017; Amos & Kolter 2017): Bibtex, Delicious, and Bookmarks.
Category: