Roleset concentrate.01 Verbnet Class: NONE "affix attention on":

Roles:

Arg0:agent, contrentrater


Arg1:contrentrated-on


Arg2:thing contrentrated, if separate from agent

Examples:

most typical usage (-)
The move also would allow the company to concentrate on core businesses, which include ceramic tile, floor coverings and furniture.
Arg0:	the company
REL:	concentrate
Arg1-on:	core businesses, which include ceramic tile, floor coverings and furniture




with thing concentrated (-)
Hunter wants *trace* to concentrate its resources on the insurance business.
Arg0:	*trace* -> Hunter
REL:	concentrate
Arg2:	its resources
Arg1-on:	the insurance business

Args 1 and 2 are reversed from 'focus'.

Roleset concentrate.02 Verbnet Class: NONE "cause a reduction in volume (as of a liquid)":

Roles:

Arg0:causer


Arg1:liquid

Examples:

somewhat bizarre (-)
John concentrated the herbal extract.
Arg0:	John
REL:	concentrated
Arg1:	the herbal extract

This is mostly here to account for future adjectival usages like "concentrated orange juice".