what races did nathan brown run in 2013?
copa america de ciclismo, vuelta al tachira, tour de san luis, vuelta a guatemala, tour of the gila, pan american cycling championships - time trial, pan american cycling championships - road race, tour of california, the philly cycling classic, coupe des nations ville saguenay, vuelta a colombia, tour de beauce, tour de delta, vuelta a venezuela, tour of elk grove, tour of utah, ruta del centro, vuelta al sur de bolivia, usa pro cycling challenge, tour do rio, tour of alberta, bucks county classic
of these, which one has nathan brown under winner?
tour de beauce