[Mark] was disappointed that his father, [James], would n't be at the play to see him perform. [Mark]'s grandmother, [Michelle], made him some cookies. [Mary] went to her brother [Mark]'s birthday party
[Mary] went to her brother [Mark]'s birthday party [Mark]'s grandmother, [Michelle], made him some cookies.
[{('Mary', 'grandmother', 'Michelle'): [('Mary', 'brother', 'Mark'), ('Mark', 'grandmother', 'Michelle')]}]