Common or Proper
Cars
What is common
Cat
What is cats
The pencil of the girl is broken.
What is the girl's pencil
The dogs of my sons were named Sasuke and Itachi.
What is sons' dogs
The teacher read the class a story.
What is teacher
Disneyland
What is proper
Sandwich
What is sandwiches
The voice of the singer isn't loud.
What is the singer's voice.
There were many eggs of the chickens.
What is chickens' eggs
The kids played hide and seek.
What is kids
Bank of America
What is proper
Elf
What is elves
The food of the mouse was our leftovers.
What is the mouse's food.
The babies of the mice ran away.
What is mice's babies
Sometimes even adults need a nap.
What is adults
Firefighter
What is common
Juice
What is juices
The apple fell off the wagon of the grandfather.
What is the grandfather's wagon.
They went to the store to buy the lunch of their children.
What is children's lunch
The scared ghost couldn't scare anyone but themself.
What is ghost.
Table
What is common
Butterfly
What is butterflies
He can describe the stories of his grandmother.
What is grandmother's stories
The pups of the walruses were sleeping.
What is walruses' pups
The silly turkey tripped on a rock.
What is turkey