['they', 'stop', 'EmptyParameter', 'fence', 'at']
['<PRP>', 'stop-55.4-1-1', 'EmptyParameter', "Synset('obstruction.n.01')", 'at']
They stop at a fence by an ornamental lake.
<PRP> stop at a Synset('obstruction.n.01') by an ornamental Synset('thing.n.12').