[Roy] asked his granddaughter [Margaret] to take him to a doctor's appointment. [Margaret] asked her sister [Renee] to come along but she said she could n't make it.
('Roy', 'Renee')
[Roy] asked his granddaughter [Margaret] to take him to a doctor's appointment. [Margaret] asked her sister [Renee] to come along but she said she could n't make it.
[{('Roy', 'granddaughter', 'Renee'): [('Roy', 'granddaughter', 'Margaret'), ('Margaret', 'sister', 'Renee')]}]