['remains', 'find', 'retain', 'EmptyParameter', 'EmptyParameter'] ['remains', 'retain', 'content', 'EmptyParameter', 'EmptyParameter']
["Synset('natural_object.n.01')", 'declare-29.4', 'retain', 'EmptyParameter', 'EmptyParameter'] ["Synset('natural_object.n.01')", 'retain', "Synset('situation.n.01')", 'EmptyParameter', 'EmptyParameter']
But its remains were found to have retained the high antimatter content.
but <PRP> Synset('natural_object.n.01') were found to have retained the Synset('high.a.04') Synset('physical_entity.n.01') Synset('situation.n.01').