Predicate: buy-back
Roleset id: buy-back.01 , purchase, vncls: 13.5.1
Roles:
        Arg0: buyer
        Arg1: thing bought
        Arg2: seller
        Arg3: price paid
        Arg4: beneficiary
Example: autogen1
        Lang Communications ' buy-back of Time Warner 's 50 % interest in
        Working Woman and Working Mother
        Arg0 : Lang Communications '
        Rel : buy-back
        Arg1 :
of Time Warner 's 50 % interest in Working Woman and Working
Mother
Example: autogen2
        a $ 1 billion buy-back of its shares
        Arg3 : $ 1 billion
        Rel : buy-back
        Arg1 : of its shares