['they', 'land', 'EmptyParameter', 'planet', 'on'] ['they', 'find', 'any', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'pocket-9.10', 'EmptyParameter', "Synset('natural_object.n.01')", 'on'] ['<PRP>', 'declare-29.4', 'any', 'EmptyParameter', 'EmptyParameter']
They'll land on any planets, if they find any.
They'll land on any planets, if <PRP> find any.