who are the tenants of the stadium which is a venue of athletics at the 2004 summer olympics – women's heptathlon ?
SELECT DISTINCT var_uri where brack_open dbr_Athletics_at_the_2004_Summer_Olympics_–_Women's_heptathlon dbp_venue var_x sep_dot var_x dbo_tenant var_uri sep_dot var_x a dbo_Stadium brack_close