which silver medalist of the athletics at the 2012 summer olympics – women's 4 × 100 metres relay was also the flagbearer of the jamaica at the 2008 summer olympics
SELECT DISTINCT var_uri where brack_open dbr_Athletics_at_the_2012_Summer_Olympics_–_Women's_4_×_100_metres_relay dbo_silverMedalist var_uri sep_dot dbr_Jamaica_at_the_2008_Summer_Olympics dbp_flagbearer var_uri brack_close