Arkens
... that the spinnenkopmolen Arkens, Franeker, is the only windmill in the Netherlands fitted with Vlinderwieken (English: Butterfly sails)?
... that the <a href="./Post_mill#Hollow_Post_mill" id="mwAoQ" rel="mw:WikiLink" title="Post mill"><i id="mwAoU">spinnenkopmolen</i></a> <b id="mwAoY"><a href="./Arkens,_Franeker" id="mwAoc" rel="mw:WikiLink" title="Arkens, Franeker">Arkens</a></b>, <a href="./Franeker" id="mwAog" rel="mw:WikiLink" title="Franeker">Franeker</a>, is the only windmill in the <a href="./Netherlands" id="mwAok" rel="mw:WikiLink" title="Netherlands">Netherlands</a> fitted with <i id="mwAoo">Vlinderwieken</i> (<span about="#mwt22" data-mw='{"parts":[{"template":{"target":{"wt":"lang-en","href":"./Template:Lang-en"},"params":{"1":{"wt":"Butterfly sails"}},"i":0}}]}' id="mwAos" typeof="mw:Transclusion">English: </span><span about="#mwt22" id="mwAow" lang="en">Butterfly sails</span>)?