['ship', 'appear', 'EmptyParameter', 'planet', 'at']
["Synset('craft.n.02')", 'appear-48.1.1', 'EmptyParameter', "Synset('natural_object.n.01')", 'at']
Two alien ships have just appeared at the planet.
<NUMBER>0 alien Synset('craft.n.02') have just appeared at the Synset('natural_object.n.01').