[Louis] loves his brother and sister, [Robert] and [Tracy]. But he hates [Robert]'s brother [Pedro]. [Rebecca] was yelling at her father [Pedro].
('Rebecca', 'Tracy')
[Rebecca] was yelling at her father [Pedro]. [Louis] loves his brother and sister, [Robert] and [Tracy]. But he hates [Robert]'s brother [Pedro].
[{('Rebecca', 'aunt', 'Tracy'): [('Rebecca', 'father', 'Pedro'), ('Pedro', 'sister', 'Tracy')]}, {('Pedro', 'sister', 'Tracy'): [('Pedro', 'brother', 'Robert'), ('Robert', 'sister', 'Tracy')]}, {('Robert', 'sister', 'Tracy'): [('Robert', 'brother', 'Louis'), ('Louis', 'sister', 'Tracy')]}]
['father', 'brother', 'brother', 'sister']