which limnologist won an oscar ?
select distinct var_uri where brack_open brack_open var_uri dbo_field dbr_Limnologist sep_dot brack_close union brack_open var_uri dc:description var_s sep_dot filter regex attr_open var_s,'dbr_Limnologist','i' attr_close brack_close var_uri dbo_award dbr_Academy_Awards sep_dot brack_close