<svg width="230" height="120" xmlns="http://www.w3.org/2000/svg">
  <filter id="blurMe">
    <feGaussianBlur stdDeviation="5"/>
  </filter>
  
  <circle cx="60" cy="60" r="50" fill="green"/>
  
  <circle cx="170" cy="60" r="50" fill="green" filter="url(#blurMe)"/>
</svg>

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