<!DOCTYPE para PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
          "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
<para>
Einstein's most famous equation,
<inlineequation>
<inlinemediaobject>
<imageobject>
<imagedata fileref="figures/emc2.png"/>
</imageobject>
<textobject>
<phrase>E=mc<superscript>2</superscript></phrase>
</textobject>
</inlinemediaobject>
</inlineequation>, expresses the relationship between matter
and energy.
</para>