which silver medalist of the athletics at the 2008 summer olympics – men's 800 metres was also the flagbearer of the sudan at the 2012 summer olympics
SELECT DISTINCT var_uri where brack_open dbr_Athletics_at_the_2008_Summer_Olympics_–_Men's_800_metres dbo_silverMedalist var_uri sep_dot dbr_Sudan_at_the_2012_Summer_Olympics dbp_flagbearer var_uri brack_close