['quake', 'cause', 'EmptyParameter', 'phosphorus', 'by']
["Synset('natural_phenomenon.n.01')", 'engender-27.1-1', 'EmptyParameter', "Synset('substance.n.01')", 'by']
The quakes are being caused by unexpected liquid phosphorus.
the Synset('natural_phenomenon.n.01') are being caused by Synset('unexpected.a.01') Synset('melted.a.01') Synset('substance.n.01').