How to Break up a Long Element List into multiple lines of code (Applescript)
If you want it more readable, then use property and separate the list you have into individual properties, e.g.:

property target : "Safari"
property slideNo : 2
property propsUrl : "https://docs.google.com/presentation/d/slideId/preview"
property rewardsUrl : "https://docs.google.com/presentation/d/slideId/preview"
property coords : {posX:937, posY:497, sizeX:149, sizeY:262}