[Robert] has plans to hang out with his sister [Tracy] and his brother [Pedro] tonight. After [Pedro] arrives at [Robert]'s house, [Robert] will drive to pick up [Tracy] at her father [Harold]'s house. [Pedro] became friends with [Dorothy] in high school, and later the two were married.
('Dorothy', 'Harold')
[Pedro] became friends with [Dorothy] in high school, and later the two were married. [Robert] has plans to hang out with his sister [Tracy] and his brother [Pedro] tonight. After [Pedro] arrives at [Robert]'s house, [Robert] will drive to pick up [Tracy] at her father [Harold]'s house.
[{('Dorothy', 'father-in-law', 'Harold'): [('Dorothy', 'husband', 'Pedro'), ('Pedro', 'father', 'Harold')]}, {('Pedro', 'father', 'Harold'): [('Pedro', 'brother', 'Robert'), ('Robert', 'father', 'Harold')]}, {('Robert', 'father', 'Harold'): [('Robert', 'sister', 'Tracy'), ('Tracy', 'father', 'Harold')]}]
['husband', 'brother', 'sister', 'father']