[Pedro] took his daughter [Heather] to see her grandfather [Harold] after school yesterday. [Harold] is taking his son [Louis] out for coffee. [Louis] wanted to get a good gift for his sister, [Tracy]
('Pedro', 'Tracy')
[Pedro] took his daughter [Heather] to see her grandfather [Harold] after school yesterday. [Harold] is taking his son [Louis] out for coffee. [Louis] wanted to get a good gift for his sister, [Tracy]
[{('Pedro', 'sister', 'Tracy'): [('Pedro', 'father', 'Harold'), ('Harold', 'daughter', 'Tracy')]}, {('Pedro', 'father', 'Harold'): [('Pedro', 'daughter', 'Heather'), ('Heather', 'grandfather', 'Harold')]}, {('Harold', 'daughter', 'Tracy'): [('Harold', 'son', 'Louis'), ('Louis', 'sister', 'Tracy')]}]
['daughter', 'grandfather', 'son', 'sister']