venues
... that all four football venues at the 1968 Summer Olympics would be used as FIFA World Cup stadia when Mexico hosted the Cup in 1970 and 1986?
... that all four <a href="./Football_at_the_1968_Summer_Olympics" id="mwDvs" rel="mw:WikiLink" title="Football at the 1968 Summer Olympics">football</a> <b id="mwDvw"><a href="./Venues_of_the_1968_Summer_Olympics" id="mwDv0" rel="mw:WikiLink" title="Venues of the 1968 Summer Olympics">venues</a></b> at the <a href="./1968_Summer_Olympics" id="mwDv4" rel="mw:WikiLink" title="1968 Summer Olympics">1968 Summer Olympics</a> would be used as <a href="./FIFA_World_Cup" id="mwDv8" rel="mw:WikiLink" title="FIFA World Cup">FIFA World Cup</a> stadia when <a href="./Mexico" id="mwDwA" rel="mw:WikiLink" title="Mexico">Mexico</a> hosted the Cup in <a href="./1970_FIFA_World_Cup" id="mwDwE" rel="mw:WikiLink" title="1970 FIFA World Cup">1970</a> and <a href="./1986_FIFA_World_Cup" id="mwDwI" rel="mw:WikiLink" title="1986 FIFA World Cup">1986</a>?