[Frances] kept her grandson [Pete] last weekend so his parents could go to a concert. [Cindy] has a son named [Pete]. [Francisco] takes his wife [Cindy] out for their anniversary.
('Francisco', 'Frances')
[Francisco] takes his wife [Cindy] out for their anniversary. [Cindy] has a son named [Pete]. [Frances] kept her grandson [Pete] last weekend so his parents could go to a concert.
[{('Francisco', 'mother-in-law', 'Frances'): [('Francisco', 'wife', 'Cindy'), ('Cindy', 'mother', 'Frances')]}, {('Cindy', 'mother', 'Frances'): [('Cindy', 'son', 'Pete'), ('Pete', 'grandmother', 'Frances')]}]
['wife', 'son', 'grandmother']