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<!--
Any copyright is dedicated to the Public Domain.
-->
<html>
<style>
#a {
background-color: rgb(0,255,0);
width: 200px;
height: 210px;
}
#b {
position: absolute;
top:80px;
filter:url(#f);
}
</style>
<svg height="0">
<filter id="f">
<feColorMatrix values="1 1 1 0 0
1 1 1 0 0
1 1 1 0 0
0 0 0 1 0"/>
</filter>
</svg>
<div id="a">
<div id="b">.</div>
</div>
</html>