Ba'athists in Yemen
... that Ba'athists in Yemen carried out clandestine political activity until 1990?
... that <b id="mwARs"><a href="./National_Arab_Socialist_Ba'ath_Party_–_Yemen_Region" id="mwARw" rel="mw:WikiLink" title="National Arab Socialist Ba'ath Party – Yemen Region">Ba'athists in Yemen</a></b> carried out clandestine political activity until 1990?