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:However, knowing MWEs at the source side already can improve the quality of MT (Carpuat and Diab 2010), and sometimes it is better to transliterate them instead of translating them (Pal et al. 2010).
Category: