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Method and system for processing an attributed graph that comprises a training dataset of labelled nodes and an unlabeled dataset of unlabeled nodes. The method and system includes selecting, using logistic regression, which candidate node from a plurality of possible candidate nodes included in the unlabeled dataset will minimize a risk if that candidate node is added to the training dataset; obtaining a label for the selected candidate node from a classification resource; and adding the selected candidate node and the obtained label to the training dataset as a labelled node to provide an enhanced training dataset.