[Lena]'s sister, [David], and her daughter, [Mildred], took her brother [Francisco] out.
('Mildred', 'Francisco')
[Lena]'s sister, [David], and her daughter, [Mildred], took her brother [Francisco] out.
[{('Mildred', 'uncle', 'Francisco'): [('Mildred', 'mother', 'Lena'), ('Lena', 'brother', 'Francisco')]}, {('Lena', 'brother', 'Francisco'): [('Lena', 'sister', 'David'), ('David', 'brother', 'Francisco')]}]
['mother', 'sister', 'brother']