Predicate: prevention
Roleset id: prevention.01 , stop, prevent, vncls:
Roles:
        Arg0: agent
        Arg1: theme (action or object being prevented
        Arg2: secondary predication or action
        Arg3: instrument
Example: autogen1
        Smoking prevention programs
        Arg1 : Smoking
        Rel : prevention
Example: autogen2
        crime prevention
        Arg1 : crime
        Rel : prevention