light rail line
... that a light rail line in Seattle will become the first to use a floating bridge?
... that a <b id="mwAUQ"><a class="mw-redirect" href="./East_Link_Extension" id="mwAUU" rel="mw:WikiLink" title="East Link Extension">light rail line</a></b> in <a href="./Seattle" id="mwAUY" rel="mw:WikiLink" title="Seattle">Seattle</a> will become the first to use a <a href="./Pontoon_bridge" id="mwAUc" rel="mw:WikiLink" title="Pontoon bridge">floating bridge</a>?