if something fronts something else then that something else is a cause of that something
rust_causing_stuff is tangible_thing. sometimes_watching_television_causes is good_general_knowledge. cause is origin. sometimes_watching_television_causes is not good_general_knowledge. front_matter is not matter. space is what_between_else. front is not sphere. space is not what_between_else. front_wall is not front. rust_causing_stuff is not tangible_thing.