['it', 'be', 'prevent', 'EmptyParameter', 'EmptyParameter'] ['it', 'prevent', 'emission', 'EmptyParameter', 'EmptyParameter'] ['they', 'go', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'seem-109', 'forbid-64.4-1', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'forbid-64.4-1', "Synset('change_of_location.n.01')", 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'say-37.7', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
It is to prevent EM emissions from entering the ship from the nebula they were going through.
<PRP> is to prevent Synset('unit_of_measurement.n.01') Synset('change_of_location.n.01') from entering the Synset('craft.n.02') from the <MISC>0 <PRP> were going through.