[Nicholas] and his brother [Dale] both played soccer. [Nicholas] was faster, but [Dale] had a better shot, so they complemented each other well. [Dale] went to the baseball game with his brother [George].
('Nicholas', 'George')
[Nicholas] and his brother [Dale] both played soccer. [Nicholas] was faster, but [Dale] had a better shot, so they complemented each other well. [Dale] went to the baseball game with his brother [George].
[{('Nicholas', 'brother', 'George'): [('Nicholas', 'brother', 'Dale'), ('Dale', 'brother', 'George')]}]
['brother', 'brother']