Input text: The large white duck is twenty feet in front of the [camo] tiny castle. The large tan duck is to the right of the white duck. The large gray duck is to the left of the white duck. The ground has a grass texture. It is cloudy. The large black duck is to the right of the tan duck. A river is in back of the castle. The river is 100 feet long. The large [sand] duck is to the left of the gray duck. The castle is in front of the ducks.