“…In recent years, many real‐world networks, such as the World Wide Web (Albert, Jeong, & Barabási, ), social networks (Li, Foo, Tew, & Ng, ; Wasserman & Faust, ), biological networks (Li, Foo, & Ng, ; Li, Tan, Foo, & Ng, ; Li, Wu, Kwoh, & Ng, ; Palla, Derényi, Farkas, & Vicsek, ; Steinhaeuser & Chawla, ; Wu, Li, Kwoh, & Ng, ), citation networks (Redner, ), and communication networks (Nisheeth, Anirban, & Rastogi, ) have become available for data mining. A key task in mining these networks is to find the underlying communities, where a community is a group of people or objects that share some common interests.…”