17 championships
... that in the last 50 years, 17 championships have been retired by current professional wrestling company World Wrestling Entertainment?
... that in the last 50 years, <b id="mwCgA"><a class="mw-redirect" href="./List_of_former_championships_in_World_Wrestling_Entertainment" id="mwCgE" rel="mw:WikiLink" title="List of former championships in World Wrestling Entertainment">17 championships</a></b> have been retired by current <a href="./Professional_wrestling" id="mwCgI" rel="mw:WikiLink" title="Professional wrestling">professional wrestling</a> company <a class="mw-redirect" href="./World_Wrestling_Entertainment" id="mwCgM" rel="mw:WikiLink" title="World Wrestling Entertainment">World Wrestling Entertainment</a>?