the semantic role of the animate entity that instigates or causes the happening denoted by the verb in the clause | set used to broadcast radio or tv signals |
an active and efficient cause; capable of producing a certain effect | any agent (person or animal or microorganism) that carries and transmits a disease |
a businessman who buys or sells for another in exchange for a commission | someone who transmits a message |
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 | |