Predicate: broadcast
Roleset id: broadcast.01 , to transmit or announce, vncls:
Roles:
        Arg0: transmitter, agent
        Arg1: message
        Arg2: audience
        Arg3: source
Example: autogen1
        a network news broadcast
        Arg0 : network
        Arg1 : news
        Rel : broadcast
Example: autogen2
        viewers watch the major broadcast networks
        Arg2 : viewers
        ArgSupport : watch networks
        Arg1-REF : broadcast
        Rel : broadcast
        Arg0 : networks