Task: Question Answering
Input (English): My wife and I decided to invite some friends over.  We wanted to clean our and house and make it look good after it was messed up by my daughter.  One of the first things that we did to clean was to get out the vacuum.  To do so, I opened up the door to the closet and got it out of there.  I took the plug and put it in a socket that was close to the area of the floor that I wanted to clean.  I hit the power button and the vacuum started to make a weird noise.  I opened the vacuum up and cleaned the inside out.  After that, it was ready to get started.  I pushed the vacuum all over the floor in every part of the house.  It was very loud and it was nice to push the power button and turn it off when I was finished. 
Question: When did they start vacuuming?
Output (English): After cleaning out the inside.