['duty', 'be', 'try', 'EmptyParameter', 'EmptyParameter'] ['duty', 'try', 'stop', 'they', 'EmptyParameter']
["Synset('activity.n.01')", 'seem-109', 'try-61.1', 'EmptyParameter', 'EmptyParameter'] ["Synset('activity.n.01')", 'try-61.1', 'stop-55.4-1-1', '<PRP>', 'EmptyParameter']
As such, his duty is to try to stop them.
as such, <PRP> Synset('activity.n.01') is to try to stop <PRP>.