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 compare the proposed classification algorithm (denoted as ‚ÄúCoLiBRi‚Äù for ‚ÄúConcept Lattice-Based Rule-learner‚Äù) with Scikit-learn [12] implementations of CART [2], Random Forest [1] and kNN on several datasets from the UCI machine learning repository.1
 1 http://repository.seasr.org/Datasets/UCI/csv/
 We used Gini impurity as a criterion for rule selection and MDL [3] for continuous feature discretization.
Category: