The friends of my sister
my sister's friends
the brother of my cousin
my cousin's brother
the brother of my cousins
my cousins' brother
the mother of my sisters
my sisters' mother
the name of the student
the student's name
the names of the students
the students' names
the toys of the child
the child's toys
the toys of the children
the children's toys
the milk of the baby
the baby's milk
the milk of the babies
the babies' milk
the sister of James
James' sister
the clothing of the man
the man's clothing
the clothing of the men
the men's clothing
the restroom of the woman
the woman's restroom
the restroom of the women
the women's restroom
the wife of John
John's wife
grades of the students
the students' grades
the grades of the student
the student's grades
the skin of the elephant
the elephant's skin
the eyes of the person
the person's eyes
the coats of the doctor
the doctor's coats
the friends of my sisters
my sisters' friends