Abstract: A method for filling a knowledge graph. A first and second subset of data points are determined. A data point to which a label is assigned is associated with a cluster from among a set of clusters, depending on whether a distribution of labels from data points that are already associated with the cluster satisfies a condition. Data points that are associated with the cluster are associated with the first or second subset. Models for classification are trained depending on data points from the first subset. For at least one of the models, a value of a quality factor is determined depending on data points from the second subset. A model for classification is selected from the models depending on the value. A classification that defines a relationship, node, or type of node in the knowledge graph for the sentence is determined using the selected model.