[Tom] wanted to buy a great gift for his mom, [Michelle], so he asked her brother, [Matthew], for advice. [Cheryl] and her brother [Tom] went to the diner to eat yummy food together.
('Matthew', 'Cheryl')
[Tom] wanted to buy a great gift for his mom, [Michelle], so he asked her brother, [Matthew], for advice. [Cheryl] and her brother [Tom] went to the diner to eat yummy food together.
[{('Matthew', 'niece', 'Cheryl'): [('Matthew', 'sister', 'Michelle'), ('Michelle', 'daughter', 'Cheryl')]}, {('Michelle', 'daughter', 'Cheryl'): [('Michelle', 'son', 'Tom'), ('Tom', 'sister', 'Cheryl')]}]