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 section, we perform an empirical evaluation of the proposed approach considering two real datasets: (i) OUTDOOR dataset created by Oliva and Torralba [12], and (ii) SUN09 dataset created by Choi [2].
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