[Emma] spent the whole month of January at her grandfather [Harold]'s house. [Pedro] is the great brother of [Robert]. [Tracy] could n't wait for the surprise birthday party that she was throwing for her brother [Pedro] next weekend. [Tracy]'s daughter, [Emma], just graduated high school.
('Robert', 'Harold')
[Pedro] is the great brother of [Robert]. [Tracy] could n't wait for the surprise birthday party that she was throwing for her brother [Pedro] next weekend. [Tracy]'s daughter, [Emma], just graduated high school. [Emma] spent the whole month of January at her grandfather [Harold]'s house.
[{('Robert', 'father', 'Harold'): [('Robert', 'sister', 'Tracy'), ('Tracy', 'father', 'Harold')]}, {('Tracy', 'father', 'Harold'): [('Tracy', 'daughter', 'Emma'), ('Emma', 'grandfather', 'Harold')]}, {('Robert', 'sister', 'Tracy'): [('Robert', 'brother', 'Pedro'), ('Pedro', 'sister', 'Tracy')]}]
['brother', 'sister', 'daughter', 'grandfather']