who are the tenants of the stadium which is a venue of swimming at the 2012 summer olympics – men's 4 × 100 metre freestyle relay ?
SELECT DISTINCT var_uri where brack_open dbr_Swimming_at_the_2012_Summer_Olympics_–_Men's_4_×_100_metre_freestyle_relay dbp_venue var_x sep_dot var_x dbo_tenant var_uri sep_dot var_x a dbo_Stadium brack_close