[Louis] was playing soccer with his sisters [Marie] and [Dorothy]. [Marie]'s other sister [Beverly] was playing on the other team. [Tracy] and her sister [Dorothy] are the only children in their family.
('Beverly', 'Tracy')
[Louis] was playing soccer with his sisters [Marie] and [Dorothy]. [Marie]'s other sister [Beverly] was playing on the other team. [Tracy] and her sister [Dorothy] are the only children in their family.
[{('Beverly', 'sister', 'Tracy'): [('Beverly', 'sister', 'Marie'), ('Marie', 'sister', 'Tracy')]}, {('Marie', 'sister', 'Tracy'): [('Marie', 'brother', 'Louis'), ('Louis', 'sister', 'Tracy')]}, {('Louis', 'sister', 'Tracy'): [('Louis', 'sister', 'Dorothy'), ('Dorothy', 'sister', 'Tracy')]}]
['sister', 'brother', 'sister', 'sister']