world's largest producer
... that Nigeria is the world's largest producer of yams?
... that <a href="./Nigeria" id="mwBpM" rel="mw:WikiLink" title="Nigeria">Nigeria</a> is the <b id="mwBpQ"><a href="./Yam_production_in_Nigeria" id="mwBpU" rel="mw:WikiLink" title="Yam production in Nigeria">world's largest producer</a></b> of <a href="./Yam_(vegetable)" id="mwBpY" rel="mw:WikiLink" title="Yam (vegetable)">yams</a>?