the semantic role of the animate entity that instigates or causes the happening denoted by the verb in the clause | someone who visits stores in search of articles to buy |
an active and efficient cause; capable of producing a certain effect | a commercial agent who shops at the competitor's store in order to compare their prices and merchandise with those of the store that employs her |
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 | |