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:For example, we could construct information divergence interpretations of other message-passing algorithms, such as generalized belief propagation (Yedidia et al., 2004), max-product versions of BP and TRW (Wainwright et al.
Category: