Predicate: trading

Roleset id: trading.01 , exchange, vncls: 13.1

Roles:

        Arg0: agent, entity trading
        Arg1: thing being traded (away
        Arg2: other exchanger
        Arg3: other item in exchange, price, or premium, traded for or at
        Arg4: beneficiary

Example: autogen1

        an options trading firm

        Arg1 : options
        Rel : trading
        Arg0 : firm

Example: autogen2

        current trading prices of other casino-company stocks

        Rel : trading
        Arg3 : prices
        Arg1 : of other casino-company stocks