Berny Ulloa Morera
He officiated the match between Argentina and Bulgaria at the 1986 World Cup . 
<triplet> Argentina <subj> 1986 World Cup <obj> participant in <triplet> Bulgaria <subj> 1986 World Cup <obj> participant in <triplet> 1986 World Cup <subj> Argentina <obj> participating team <subj> Bulgaria <obj> participating team <subj> 1986 <obj> point in time