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:…analogous categorization applicable to this study region only, and these categories correspond approximately to those (in parentheses) described by Spitzer and Danks (2006) (Table 2): (1) bog specialist (tyrphobiontic)—restricted or nearly so to peatlands; (2) bog affiliate…
Category: