BeatifoulSoup: nested elements : I would like to extract the Impact Factor (0.806) with BeatifoulSoup from this HTML text:

    <div id="quick-facts-container" class="SideBox">
        <ul class="ListStack ListStack--float">
            <li>
                    <span>Impact Factor</span>
                    <span>0.806</span>
                    </li>
            </ul>
    </div>

Because it's nested and I would like to get the content of the second <span> I don't know, how to do it.

Thanks in advance for any solution!