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:…and provides significant gains even in the NIST data setting, showing that this method can be effectively applied directly on the sentence level to large training
5An avenue of future work would condition the sentence topic distribution on a document distribution over topics (Teh et al., 2006).
Category: