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  <rect id="rect" width="150" height="150"/>
</defs>
<clipPath id="clip2">
  <use xlink:href="#rect"/>
</clipPath>
<clipPath id="clip1" clip-path="url(#clip2)">
  <use xlink:href="#rect" transform="translate(50, 50)"/>
</clipPath>
<rect width="200" height="200" fill="green" clip-path="url(#clip1)"/>
</svg>