[Lionel] took his sister [Sandy] out to dinner for her birthday. [Rich] met up with his sister [Alma] and her daughter [Sandy] at the mall to go shopping together.
('Rich', 'Lionel')
[Rich] met up with his sister [Alma] and her daughter [Sandy] at the mall to go shopping together. [Lionel] took his sister [Sandy] out to dinner for her birthday.
[{('Rich', 'nephew', 'Lionel'): [('Rich', 'sister', 'Alma'), ('Alma', 'son', 'Lionel')]}, {('Alma', 'son', 'Lionel'): [('Alma', 'daughter', 'Sandy'), ('Sandy', 'brother', 'Lionel')]}]