Roleset taper.01 Verbnet Class: NONE "become slender":

Roles:

Arg1:thing becoming slender

Examples:

person: ns tense: ns aspect: ns voice: ns form: infinitive


they all look like this (-)
Kenneth Mayland, economist for Society Corp., a Cleveland bank, said demand for exports of factory goods is beginning *trace* to taper off.
Arg1:	*trace* -> demand for exports of factory goods
REL:	[ taper] [ off]

Are other args possible? Corpus doesn't give any examples, and everything sounds a little weird to me.