the worst aviation accident to have occurred on Cuban soil
... that the worst aviation accident to have occurred on Cuban soil resulted in 171 deaths when the aircraft crashed shortly after takeoff?
... that <b id="mwBQc"><a class="mw-redirect" href="./Cubana_de_Aviación_Flight_9646" id="mwBQg" rel="mw:WikiLink" title="Cubana de Aviación Flight 9646">the worst aviation accident to have occurred on Cuban soil</a></b> resulted in 171<span id="mwBQk" typeof="mw:Entity"> </span>deaths when the aircraft crashed shortly after takeoff?