[entities] Protein Exp [relations] Equiv Arg1:Protein, Arg2:Protein, :symmetric-transitive Coref Anaphora:Exp, Antecedent:Exp|Protein # Expressions ("Exp") can contain protein names ("Protein") and can # nest arbitrarily. ENTITY-NESTING Arg1:Protein, Arg2:Exp ENTITY-NESTING Arg1:Exp, Arg2:Exp [events] [attributes]