Resource id #71select distinct description_id from clade_description where description_page_id = (select id from core.page where lower(name)=lower('stirps Olivaceogrisea') )
			UNION
			SELECT distinct description_id from clade_description where 
				lower(clade_stirps) = lower( 'Olivaceogrisea' )   ;ERROR:  more than one row returned by a subquery used as an expression