there is only one dog in the house.
there are two cats in the box.
there is one key on the table.
there are two pens on the desk.
there is one mouse under the bed.
there are two footballs under the chair.
There is a pen in the pencilcase.
The pencilcase is on the table.
My cat is under the table.
There are four people in the car.
There are two basketballs under my bed.
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