what is the birth location of the pope who was canonized by john of perugia and peter of sassoferrato ?
SELECT DISTINCT var_uri where brack_open dbr_John_of_Perugia_and_Peter_of_Sassoferrato dbo_canonizedBy var_x sep_dot var_x dbo_birthPlace var_uri sep_dot var_x a dbo_Pope brack_close