pre-Columbian savanna
... that pre-Columbian savanna once covered much of North America?
... that <b id="mwBvw"><a class="mw-redirect" href="./Pre-Columbian_savannas_of_North_America" id="mwBv0" rel="mw:WikiLink" title="Pre-Columbian savannas of North America">pre-Columbian savanna</a></b> once covered much of <a href="./North_America" id="mwBv4" rel="mw:WikiLink" title="North America">North America</a>?