Predicate: security
Roleset id: security.01 , enter into a contract, vncls:
Roles:
        Arg0: purchaser/owner
        Arg1: purpose/collateral
        Arg2: borrower/issuer
        Arg3: yield/price
Example: autogen1
        $ 500 million of Remic mortgage securities
        Arg3 : $ 500 million
        Arg2 : Remic
        Arg1 : mortgage
        Rel : securities
Example: autogen2
        More big Japanese investors are buying U.S. mortgage-backed
        securities , reversing a recent trend .
        Arg0 : More big Japanese investors
        ArgSupport : buying
        Arg2 : U.S.
        Arg1 : mortgage-backed
        Rel : securities
Roleset id: security.02 , make secure, vncls:
Roles:
        Arg0: maker
        Arg1: thing secured
        Arg2: instrument
        Arg3: secondary-theme
Example: autogen1
        its security apparatus
        Arg1 : its
        Rel : security
        Arg0 : apparatus
Example: autogen2
        America 's national security
        Arg3 : America 's
        Arg1 : national
        Rel : security