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:…2005), wild fires (Gancet et al., 2005; Merino et al., 2006), victims (Kuiper and NadjmTehrani, 2006; Murphy et al., 2008), objects (Stirling et al., 2010) and other targets of interest (Altshuler et al., 2008; Cole et al., 2006; Ruini and Cangelosi, 2009; Sauter et al., 2005; Yang et al., 2005).
Category: