['they', 'make', 'EmptyParameter', 'receptor', 'to']
['<PRP>', 'build-26.1', 'EmptyParameter', "Synset('body_part.n.01')", 'to']
The alterations they made to the blood's immune receptors weren't effective.
the Synset('change_of_integrity.n.01') <PRP> made to the blood's Synset('immune.a.01') Synset('body_part.n.01') weren't Synset('effective.a.01').