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 evaluated our document model using an established dataset for semantic document similarity (50 documents dataset from Lee et al. (2005) (LP50)) and show that our approach outperforms baselines relying on traditional, i.e., ‘flat’, document representations, and also produces results close to…
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