['they', 'seem', 'head', 'EmptyParameter', 'EmptyParameter'] ['they', 'head', 'EmptyParameter', 'refinery', 'EmptyParameter']
['<PRP>', 'seem-109-1-1-1', 'contiguous_location-47.8', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'pit-10.7', 'EmptyParameter', "Synset('building_complex.n.01')", 'EmptyParameter']
They seem to be heading for one of the oxygen refineries.
<PRP> seem to be heading for one of the Synset('substance.n.01') Synset('building_complex.n.01').