Predicate: background
Roleset id: background.01 , attribute, vncls:
Roles:
        Arg1: theme
        Arg2: value
        Arg3: secondary-theme
Example: autogen1
        his consulting-firm background
        Arg1 : his
        Arg2 : consulting-firm
        Rel : background
Example: autogen2
        candidates with both patent and scientific backgrounds
        Arg1 : candidates
        Arg2 : both patent and scientific
        Rel : backgrounds