[Mary] loves her grandson [Robert]. [Robert] loves her, too. [Renee] went car shopping with her brother [Robert].
('Mary', 'Renee')
[Mary] loves her grandson [Robert]. [Robert] loves her, too. [Renee] went car shopping with her brother [Robert].
[{('Mary', 'granddaughter', 'Renee'): [('Mary', 'grandson', 'Robert'), ('Robert', 'sister', 'Renee')]}]