[Roberto] is a very hot guy, but his sister [Rebecca] is even more attractive. [Dorothy]'s son [Jeffrey] missed seeing his mother on the weekends. [Rebecca] and her brother [Jeffrey] watched TV together. [Roberto] was invited to watch too, because [Rebecca] is his sister.
('Rebecca', 'Dorothy')
[Roberto] is a very hot guy, but his sister [Rebecca] is even more attractive. [Rebecca] and her brother [Jeffrey] watched TV together. [Roberto] was invited to watch too, because [Rebecca] is his sister. [Dorothy]'s son [Jeffrey] missed seeing his mother on the weekends.
[{('Rebecca', 'mother', 'Dorothy'): [('Rebecca', 'brother', 'Roberto'), ('Roberto', 'mother', 'Dorothy')]}, {('Roberto', 'mother', 'Dorothy'): [('Roberto', 'brother', 'Jeffrey'), ('Jeffrey', 'mother', 'Dorothy')]}, {('Roberto', 'brother', 'Jeffrey'): [('Roberto', 'sister', 'Rebecca'), ('Rebecca', 'brother', 'Jeffrey')]}]
['brother', 'sister', 'brother', 'mother']