In one embodiment, one or more server computing devices receive, from a client computing device, a request for first information associated with a first node of a graph. The one or more server computing devices determine whether the first node is associated with a cluster of nodes. A cluster of nodes includes one or more concept nodes of the graph that are related to each other. When the first node is associated with a cluster of nodes, the one or more server computing devices access the cluster of nodes that the first node is associated with, obtain second information from one or more of the nodes in the cluster of nodes that the first node is associated with, and provide the second information for rendering by the client computing device.