Antonio Carlos Ortega
He competed in the 2000 Summer Olympics and in the 2004 Summer Olympics . 
<triplet> 2000 Summer Olympics <subj> 2000 <obj> point in time <subj> 2004 Summer Olympics <obj> followed by <triplet> 2004 Summer Olympics <subj> 2000 Summer Olympics <obj> follows <subj> 2004 <obj> point in time