Onán Barreiros
Barreiros made his official debut at the 2008 Summer Olympics in Beijing , where he paired up with crew member Aarón Sarmiento in the men's 470 class . 
<triplet> 2008 Summer Olympics <subj> 2008 <obj> point in time <subj> Beijing <obj> location <triplet> Aarón Sarmiento <subj> 2008 Summer Olympics <obj> participant in