list of longest streams of Oregon
... that more than 50 rivers and creeks on the list of longest streams of Oregon are at least 40 miles (64 km) long?
... that more than 50 rivers and creeks on the <b id="mwHcs"><a href="./List_of_longest_streams_of_Oregon" id="mwHcw" rel="mw:WikiLink" title="List of longest streams of Oregon">list of longest streams of Oregon</a></b> are at least <span about="#mwt123" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"40"},"2":{"wt":"mi"},"3":{"wt":"km"}},"i":0}}]}' id="mwHc0" typeof="mw:Transclusion">40 miles (64</span><span about="#mwt123" typeof="mw:Entity"> </span><span about="#mwt123">km)</span> long?