Knowing the social roles of a person can help understand his or her interactions with the environment, and identification and acquisition of such social roles are very useful for a number of applications. In this paper, we propose a modeling framework of social contexts, roles and relations, and present a method of extracting role-specific rules from Web story episodes based on this framework. Then we introduce a rule expanding method which expands the seed rules of social roles. We believe that our work is useful for identifying social roles from text.