Action is a verb describing what is happening. Objects are entities or people that change as a result of the action. Instrument is an entity or person or organization which the agent uses to process the object. Alignment is the part of the object or setting where the action is focused, typically the object of a preposition. Setting is an encompassing entity within which the action is done.
Product is the entity or state change produced by the action.
Here, for example, is an event and its categorizations. Follow these steps. Click the radio button for the category you are coding. The button will be highlighted. If coding an action select the appropriate verb from the Action popup menu.