[Lillian] called her daughter [Andrea] to ask her to do her a favor. [Andrea] was n't available so she called [Andrea]'s sister [April] who answered right away.
('April', 'Lillian')
[Lillian] called her daughter [Andrea] to ask her to do her a favor. [Andrea] was n't available so she called [Andrea]'s sister [April] who answered right away.
[{('April', 'mother', 'Lillian'): [('April', 'sister', 'Andrea'), ('Andrea', 'mother', 'Lillian')]}]
['sister', 'mother']