[Timmy] went to visit his sister [Regina]. But [Regina] was already hanging out with [Roy] which is [Timmy]'s grandfather.
('Roy', 'Regina')
[Timmy] went to visit his sister [Regina]. But [Regina] was already hanging out with [Roy] which is [Timmy]'s grandfather.
[{('Roy', 'granddaughter', 'Regina'): [('Roy', 'grandson', 'Timmy'), ('Timmy', 'sister', 'Regina')]}]