context: When I woke up this morning, I really wanted to eat some toast.  I walked into my kitchen and made sure that my toaster was plugged into the wall.  Then, I got out a loaf of bread and took out two pieces.  I put each piece into one half of the toaster in the little slots.  I didn't want my bread to be too burnt, so I turned down the setting so it wasn't going to be in the toaster for so long.  I pushed the lever down and the bread started to cook in the toaster.  While it was cooking, I got out some butter and a knife so I could put that on the toast.  When the toast was finished, the pieces popped outside of the toaster, ready to pull out.  I pulled them out and put them on a plate and put butter on both of the pieces.
question: Where did they get the butter?
reference: From the refrigerator
candidate: they put it in the toaster to help hold the butter together