[Lynn], the wife of [Joshua], dropped her son, [Don], off at sleep away camp. [Don]'s grandfather, [James], picked him up from the camp a week later because his father could n't get the time off of work.
('Joshua', 'James')
[Lynn], the wife of [Joshua], dropped her son, [Don], off at sleep away camp. [Don]'s grandfather, [James], picked him up from the camp a week later because his father could n't get the time off of work.
[{('Joshua', 'father-in-law', 'James'): [('Joshua', 'wife', 'Lynn'), ('Lynn', 'father', 'James')]}, {('Lynn', 'father', 'James'): [('Lynn', 'son', 'Don'), ('Don', 'grandfather', 'James')]}]
['wife', 'son', 'grandfather']