[Harold]'s granddaughter [Erika] is coming over to visit him this afternoon. [Erika] and her mother [Tracy] decided to visit [Tracy]'s brothers [Robert] and [Antonio] one day and they ordered pizza for dinner when they were there.
('Antonio', 'Harold')
[Erika] and her mother [Tracy] decided to visit [Tracy]'s brothers [Robert] and [Antonio] one day and they ordered pizza for dinner when they were there. [Harold]'s granddaughter [Erika] is coming over to visit him this afternoon.
[{('Antonio', 'father', 'Harold'): [('Antonio', 'brother', 'Robert'), ('Robert', 'father', 'Harold')]}, {('Robert', 'father', 'Harold'): [('Robert', 'sister', 'Tracy'), ('Tracy', 'father', 'Harold')]}, {('Tracy', 'father', 'Harold'): [('Tracy', 'daughter', 'Erika'), ('Erika', 'grandfather', 'Harold')]}]
['brother', 'sister', 'daughter', 'grandfather']