Predicate: taper_off
Frames file for 'taper' based on sentences in wsj. No Verbnet entry
at the moment, but it's probably 45.4 'other causative'.
Roleset id: taper.01 , become slender, vncls: -
Roles:
        Arg1: thing becoming slender
Example: they all look like this
        person: ns,  tense: ns,  aspect: ns,  voice: ns,  form: infinitive
        Kenneth Mayland, economist for Society Corp., a Cleveland bank,
        said [demand for exports of factory goods]-1 is beginning *trace*-1 to
        taper off.
        Arg1 : *trace*
        Rel : [ taper] [ off]