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<sentence>
 <Forall>
  <declare><Var>grade</Var></declare>
  <formula>
   <Implies>
    <if>
     <External>
      <content>
       <Atom>
        <op><Const type="rif:iri">op:numeric-greater-than</Const></op>
        <arg><Var>grade</Var></arg>
        <arg><Const type="xsd:decimal">4</Const></arg>
       </Atom>
      </content>
     </External>
    </if>
    <then>
     <Atom>
      <op><Const type="rif:iri">op:remove-grade</Const></op>
      <arg><Var>grade</Var></arg>
     </Atom>
    </then>
   </Implies>
  </formula>
 </Forall>
</sentence>

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