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 used the fully-connected model, F1, as well as shallow convolutional models C1 and C3 suggested by Keskar et al. (2017). As a demonstration of more current architectures, we used the models: VGG (Simonyan, 2014) and Resnet44 (He et al.
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