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:We
1Relations between non-adjacent utterances are constrained by the structure of discourse (Webber 1991), and thus less likely than relations between adjacent utterances.
assume that the same event can reoccur in different contexts, we are thus studying relations between types of events.
Category: