1. A method, comprising: generating a URL-sketch for a node based on one or more node labels associated with the node and extracted from one or more other nodes; generating a neighborhood-sketch for the node based on one or more neighboring node labels associated with one or more neighboring nodes specified within the URL-sketch for the node; and determining a distance between the node and a second node based on the neighborhood-sketch, the determining comprising computing an approximate number of paths between the node and the second node.