which place of 2012 summer olympics opening ceremony is the location of doubletree by hilton hotel london - kensington ?
SELECT DISTINCT var_uri where brack_open dbr_DoubleTree_by_Hilton_Hotel_London_-_Kensington dbp_locationTown var_uri sep_dot dbr_2012_Summer_Olympics_opening_ceremony dbp_place var_uri brack_close