buttress
...that in architecture, there are at least five kinds of buttress: clasping, angle, flying, set-back and diagonal?
...that in <a href="./Architecture" id="mwATs" rel="mw:WikiLink" title="Architecture">architecture</a>, there are at least five kinds of <b id="mwATw"><a href="./Buttress" id="mwAT0" rel="mw:WikiLink" title="Buttress">buttress</a></b>: clasping, angle, flying, set-back and diagonal?