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:…(e.g., Beard 2002; Chaimanee et al. 2000; Kay et al. 2004; Marivaux et al. 2005; Takai et al. 2005) without reservation and none of the features invoked by Jaeger et al. (1999) have been reassessed or challenged in detail, with the exception of the character analysis by Gunnell and Miller (2001).
Category: