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:In this sense, accidentally encountered information is also always algorithmically framed and often personalised by for example previous searches and geographical location (e.g. Abel et al., 2011; Feuz et al., 2011; Hannak et al., 2013).
Category: