Abstract: An example embodiment of the present invention provides an apparatus including at least one processor; and at least one memory including executable instructions, the at least one memory and the executable instructions being configured to, in cooperation with the at least one processor, cause the apparatus to perform at least the following: retrieve from a social networking service at least one of: user profile information of a user and user profile information of each contact node of the user in the social networking service; and a connection structure between the user and each contact node of the user, analyze the retrieved user profile information and/or the determined connection structure, and separate any outliers among the contact nodes on the basis of the analysis.