what is the city of the danish open and birthplace of the christiana of schleswig-holstein-sonderburg-glücksburg
SELECT DISTINCT var_uri where brack_open dbr_Danish_Open_ attr_open tennis attr_close dbp_city var_uri sep_dot dbr_Christiana_of_Schleswig-Holstein-Sonderburg-Glücksburg dbo_birthPlace var_uri brack_close