which silver medalist of the tennis at the 2012 summer olympics – women's singles was also the flagbearer of the russia at the 2012 summer olympics
SELECT DISTINCT var_uri where brack_open dbr_Tennis_at_the_2012_Summer_Olympics_–_Women's_singles dbo_silverMedalist var_uri sep_dot dbr_Russia_at_the_2012_Summer_Olympics dbp_flagbearer var_uri brack_close