Hi. I'm trying to convey that all physical events occur at a point in spacetime describing the position and time at which they occur but it's for a presentation and there's not much room on the slides so I need to keep it brief. At the moment I have: "Any physical event can be described by a point in spacetime." But it just occured to me that this is perhaps not the best as the point in spacetime doesn't actually descirbe the event. For example, if some electromagnetic interaction were to occur, the point in spacetime would tell us the where and when this event happens but not what the actual content of the event is. Can someone suggest a more succinct way of putting this please. Thanks.