[Bobby] and his brother, [Johnson], went to the lake to catch some trout. [Bobby]'s brother [Michael] was invited, but he did n't go because he could n't stand seeing fish get hooked. [David] loves playing chess her son. His name is [Michael].
('Johnson', 'David')
[Bobby] and his brother, [Johnson], went to the lake to catch some trout. [Bobby]'s brother [Michael] was invited, but he did n't go because he could n't stand seeing fish get hooked. [David] loves playing chess her son. His name is [Michael].
[{('Johnson', 'mother', 'David'): [('Johnson', 'brother', 'Bobby'), ('Bobby', 'mother', 'David')]}, {('Bobby', 'mother', 'David'): [('Bobby', 'brother', 'Michael'), ('Michael', 'mother', 'David')]}]
['brother', 'brother', 'mother']