Predicate: refining

Roleset id: refining.01 , to purify, vncls:

Roles:

        Arg0: purifier, agent
        Arg1: entity refined
        Arg2: impurities

Example: autogen1

        the San Francisco area 's large oil refining plants

        Arg1 : oil
        Rel : refining
        Arg0 : plants

Example: autogen2

        Amoco 's refining and marketing profit

        Arg0 : Amoco 's
        Rel : refining