you are likely to find Balloon in/at/on Sky. Sky is the opposite of Fog. Fog is the opposite of Clear. 
you are likely to find Water in/at/on Theater. you are likely to find Theater in/at/on Downtown. 
Balloon --AtLocation--> Sky <--Antonym--> Fog <--Antonym--> Clear 
Water --AtLocation--> Theater --AtLocation--> Downtown 