Roleset pose.01 Verbnet Class: 1 "adopt an attitude, role":

Roles:

Arg0:player


Arg1:role

Examples:

person: ns tense: ns aspect: progressive voice: active form: participle


context? We don't need no steenkin' context! (-)
A bunch of tans and bathing suits posing as lovable lifeguards .
Arg0:	A bunch of tans and bathing suits
REL:	posing
Arg1-as:	lovable lifeguards

Roleset pose.02 Verbnet Class: 1 "pose a question, problem, etc":

Roles:

Arg0:poser


Arg1:question, etc


Arg2:hearer

Examples:

person: third tense: present aspect: progressive voice: active form: participle


straight transitive (-)
But Japan's power in the region also is sparking fears of domination and posing fresh policy questions.
Arg0:	Japan's power in the region
ArgM-DIS:	also
REL:	posing
Arg1:	fresh policy questions

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


with hearer (-)
It isn't clear, however, whether support for the proposal will be broad enough *trace* to pose a serious challenge to the White House's acid-rain plan.
Arg0:	*trace* -> support for the proposal
REL:	pose
Arg1:	a serious challenge
Arg2-to:	the White House's acid-rain plan

Treebank adopts a range of syntaces for 'pose a challenge to' 'pose a problem for' etc. You may have to pull apart a constituent to get to the arguments.