Task: Question Answering
Input (English): I woke up this morning and when I turned on the bathroom light switch I noticed that one of the bulbs popped and burned out. I checked the closet where I normally keep light bulbs and could not find any. I removed the bulb to see what size I needed and made myself a note on a post it. On my way to work I stopped at the grocery store and bought a pack of replacement bulbs. When I got home from work I opened the new package of bulbs and carefully screwed the new bulb in. It immediately lit up when the contacts connected. Figuring that the other three bulbs were the same age and would probably blow out soon I decided to change the rest of them. I carefully removed and replaced each bulb. I put the bad bulbs into the package and put them in the trash. 
Question: When did they notice the light bulb burned out?
Output (English): After they woke up this morning and went into the bathroom.