['system', 'be', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
["Synset('plan.n.01')", 'representation-110.1', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
There are no inhabited systems for several light years.
there are no inhabited Synset('plan.n.01') for several Synset('light.a.06') Synset('fundamental_quantity.n.01').