Owen entered the cellar. Mason entered the back yard. Ella entered the back yard. Owen exited the cellar. The lettuce is in the green container. Mason exited the back yard. Ella moved the lettuce to the blue suitcase.
Ella think that Mason searches for the lettuce in the green container.
 Ella think that Mason searches for the lettuce in the blue_suitcase
 Ella think that Mason searches for the lettuce in the green_container