Roleset concern.01 Verbnet Class: 1 "worry about":

Roles:

Arg0:causer of concern


Arg1:worried entity


Arg2:instrument

Examples:

transitive (-)
The company said it was ``concerned about the announced intent to acquire control of the company'' by a Sugarman-led group.
Arg1:	it
REL:	concerned
Arg0-about:	the announced intent to acquire control of the company '' by a Sugarman-led group




unaccusative (-)
``We weren't as concerned until they became sell programs,'' says Mr. DaPuzzo, who now thinks it adds unnecessary volatility.
Arg1:	We
ArgM-NEG:	n't
REL:	concerned
ArgM-TMP:	until they became sell programs




with REC (-)
The ultimate goal of any investor is a profit motive, and regulators should not concern themselves with whether investors are sufficiently focused on the long term.
Arg0:	regulators
ArgM-MOD:	should
ArgM-NEG:	not
REL:	concern
Arg1-REC:	themselves
Arg2-with:	whether investors are sufficiently focused on the long term




sentential arg0 (-)
``We were concerned that they weren't going to generate enough cash for capital spending and also to pay down debt,'' says a big investor in high-yield debt.
Arg1:	We
REL:	concerned
Arg0:	that they weren't going to generate enough cash for capital spending and also to pay down debt




justification for prepositional arg0s (-)
John was concerned by the bugs crawling on his picnic lunch, but that didn't stop him from eating it.
Arg1:	John
REL:	concerned
Arg0-by:	the bugs crawling on his picnic lunch

The sentential arg0 could be rephrased as: "The fact that they weren't going to generate enough cash concerned us." You MUST include the complementizer--otherwise it's not grammatical.

Roleset concern.02 Verbnet Class: NONE "deal with, have to do with":

Roles:

Arg0:entity dealing with something


Arg1:thing dealt with

Examples:

transitive (-)
The company also said it continues to explore all options concerning the possible sale of National Aluminum's 54.5% stake in an aluminum smelter in Hawesville, Ky.
Arg0:	all options
REL:	concerning
Arg1:	the possible sale of National Aluminum's 54.5% stake in an aluminum smelter in Hawesville, Ky

I feel like these two rolesets should be mergable, and historically are probably the same, but I can't figure it out.