['officer', 'explain', 'fight', 'EmptyParameter', 'EmptyParameter']
["Synset('defender.n.01')", 'transfer_mesg-37.1.1', "Synset('contact_sport.n.01')", 'EmptyParameter', 'EmptyParameter']
The officer explains their fight.
the Synset('defender.n.01') explains <PRP> Synset('contact_sport.n.01').