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 case, evaluation of MWE acquisition is performed implicitly through the measures traditionally used to evaluate the target application (Finlayson and Kulkarni 2011; Xu et al. 2010; Carpuat and Diab 2010).
Category: