['they', 'attack', 'EmptyParameter', 'alien', 'by'] ['they', 'force', 'crash', 'EmptyParameter', 'EmptyParameter'] ['they', 'crash', 'land', 'planet', 'on']
['<PRP>', 'judgment-33.1-1', 'EmptyParameter', "Synset('person.n.01')", 'by'] ['<PRP>', 'urge-58.1', 'break-45.1', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'break-45.1', "Synset('property.n.01')", "Synset('natural_object.n.01')", 'on']
They were attacked by unknown aliens and forced to crash land on that planet.
<PRP> were attacked by Synset('unknown.a.01') Synset('person.n.01') and forced to crash Synset('property.n.01') on that Synset('natural_object.n.01').