<a href="https://en.wikipedia.org/wiki/Pierre_Curie" id="mwkA" rel="mw:WikiLink" title="Pierre Curie">Pierre</a> and <a href="https://en.wikipedia.org/wiki/Marie_Curie" id="mwkQ" rel="mw:WikiLink" title="Marie Curie">Marie Curie</a> refine <a href="https://en.wikipedia.org/wiki/Radium_chloride" id="mwkg" rel="mw:WikiLink" title="Radium chloride">radium chloride</a>.