[Michelle] took her son [Tom] to the park yesterday. [Tom]'s sister [Cheryl] was playing at a friends house and did n't get to go. [Michelle] visited her son [Keith] at college.
('Cheryl', 'Keith')
[Michelle] took her son [Tom] to the park yesterday. [Tom]'s sister [Cheryl] was playing at a friends house and did n't get to go. [Michelle] visited her son [Keith] at college.
[{('Cheryl', 'brother', 'Keith'): [('Cheryl', 'mother', 'Michelle'), ('Michelle', 'son', 'Keith')]}, {('Cheryl', 'mother', 'Michelle'): [('Cheryl', 'brother', 'Tom'), ('Tom', 'mother', 'Michelle')]}]