Isabella entered the sunroom. Mason entered the sunroom. The grapefruit is in the green container. Mason exited the sunroom. Isabella moved the grapefruit to the red bathtub. Mason entered the sunroom.
The grapefruit at the beginning was in the green container.
 the grapefruit at the beginning was in the red_bathtub
 the grapefruit at the beginning was in the green_container