the semantic role of the animate entity that instigates or causes the happening denoted by the verb in the clause | a power of attorney document given by shareholders of a corporation authorizing a specific vote on their behalf at a corporate meeting |
an active and efficient cause; capable of producing a certain effect | a person authorized to act for another |
a businessman who buys or sells for another in exchange for a commission | |
a representative who acts on behalf of other persons or organizations | |
any agent or representative of a federal agency or bureau | |
a substance that exerts some force or effect | |