Answer:
Well, a compund is putting two words together to create one. I don't see a compund owrd in this sentence. The closest word I see to being a compound word would be "slide off" but that would only be if it was written as "slide-off." Or it could be "started" because it has "start" and "ed" in it.
It could be "slide-off" or "started." I'm unsure.