[Tom] made dinner reservations for his sister [Donna]. [Keith]'s mother [Michelle] made a cake for his birthday and her other son [Tom] ate a piece of it.
('Keith', 'Donna')
[Keith]'s mother [Michelle] made a cake for his birthday and her other son [Tom] ate a piece of it. [Tom] made dinner reservations for his sister [Donna].
[{('Keith', 'sister', 'Donna'): [('Keith', 'mother', 'Michelle'), ('Michelle', 'daughter', 'Donna')]}, {('Michelle', 'daughter', 'Donna'): [('Michelle', 'son', 'Tom'), ('Tom', 'sister', 'Donna')]}]