Predicate: constraint
Roleset id: constraint.01 , prevent, hinder, vncls:
Roles:
        Arg0: preventer, hinderer, agent
        Arg1: theme (action or object being prevented
        Arg2: secondary predication or action
        Arg3: instrument
Example: autogen1
        constraints that would prevent Tele-Communications from dropping
        HBO in any of its cable systems in favor of Showtime
        Arg3-REF : constraints
        Rel : constraints
        ArgSupport : prevent
        Arg1 : Tele-Communications
        Arg2-PRD :
from dropping HBO in any of its cable systems in favor of
Showtime
Example: autogen2
        a constraint to the market
        Arg3-REF : constraint
        Rel : constraint
        Arg1 : to the market