[Nicholas] took his son [Dennis] to school this morning because he missed the bus. [Amy] was upset because her husband, [Nicholas], did n't buy her flowers for their wedding anniversary.
('Amy', 'Dennis')
[Amy] was upset because her husband, [Nicholas], did n't buy her flowers for their wedding anniversary. [Nicholas] took his son [Dennis] to school this morning because he missed the bus.
[{('Amy', 'son', 'Dennis'): [('Amy', 'husband', 'Nicholas'), ('Nicholas', 'son', 'Dennis')]}]
['husband', 'son']