We present an approach to mine cardinality restriction axioms from an existing knowledge graph. in order to extend an ontology describing the graph. We compare frequency estimation with kernel density estimation as approaches to obtain the cardinalities in restrictions. We also propose numerous strategies for filtering obtained axioms in order to make them more available for the ontol... https://ashleyshomestores.shop/product-category/outdoor-lounge-chair-with-cushion-set-of-2/