[Angelica]'s father, [Robert], and brother [Mario] went to the mall while [Robert]'s brother, [Louis], cooked dinner. [Pedro] is a sibling of [Louis].
('Pedro', 'Mario')
[Pedro] is a sibling of [Louis]. [Angelica]'s father, [Robert], and brother [Mario] went to the mall while [Robert]'s brother, [Louis], cooked dinner.
[{('Pedro', 'nephew', 'Mario'): [('Pedro', 'brother', 'Robert'), ('Robert', 'son', 'Mario')]}, {('Pedro', 'brother', 'Robert'): [('Pedro', 'brother', 'Louis'), ('Louis', 'brother', 'Robert')]}, {('Robert', 'son', 'Mario'): [('Robert', 'daughter', 'Angelica'), ('Angelica', 'brother', 'Mario')]}]
['brother', 'brother', 'daughter', 'brother']