['cube', 'join', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
["Synset('artifact.n.01')", 'mix-22.1-2-1', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
Another cube joins in, then a third.
another Synset('artifact.n.01') joins in, then a <ORDINAL>2.