which silver medalist of the swimming at the 2000 summer olympics – women's 800 metre freestyle was also the flagbearer of the ukraine at the 2008 summer olympics
SELECT DISTINCT var_uri where brack_open dbr_Swimming_at_the_2000_Summer_Olympics_–_Women's_800_metre_freestyle dbo_silverMedalist var_uri sep_dot dbr_Ukraine_at_the_2008_Summer_Olympics dbp_flagbearer var_uri brack_close