['they', 'attend', 'EmptyParameter', 'surface', 'on']
['<PRP>', 'attend-107.4-1', 'EmptyParameter', "Synset('feature.n.01')", 'on']
They have been attending on the planet's surface, referring to them as Tsunkatse matches.
<PRP> have been attending on the planet's surface, referring to <PRP> as <PERSON>8 Synset('number.n.02').