Nathan entered the playroom. Nathan exited the playroom. William entered the hall. Sophia entered the hall. The watermelon is in the blue bathtub. Sophia exited the hall. William moved the watermelon to the red cupboard. William exited the hall. Sophia entered the hall.
Sophia think that William searches for the watermelon in the red cupboard.
 Sophia think that William searches for the watermelon in the blue_bathtub
 Sophia think that William searches for the watermelon in the red_cupboard