you are likely to find Person in/at/on Garage. you are likely to find Dust in/at/on Garage. Dust is a synonym of Scatter. 
Pad is related to Message. Broadcast is a type of Message. Broadcast is a synonym of Air. Satellite is a type of Air. 
Person --AtLocation--> Garage <--AtLocation-- Dust <--Synonym--> Scatter 
Pad <--RelatedTo--> Message <--IsA-- Broadcast <--Synonym--> Air <--IsA-- Satellite 