true prefix oplsioc: prefix sioc: prefix foaf: select ?o_year, (?sum1 / ?sum2) as ?mkt_share from where { { select ?o_year sum (?volume * bif:equ (?nation, "http://dbpedia.org/resource/Brazil")) as ?sum1 sum (?volume) as ?sum2 where { { select (bif:year (?ord+>tpch:orderdate)) as ?o_year, (?li+>tpch:lineextendedprice * (1 - ?li+>tpch:linediscount)) as ?volume, ?n2+>tpch:name as ?nation where { ?li a tpch:lineitem ; tpch:has_order ?ord ; tpch:has_part ?part . ?li+>tpch:has_supplier tpch:has_nation ?n2 . ?order+>tpch:has_customer+>tpch:has_nation+>tpch:has_region tpch:name "http://dbpedia.org/resource/America" . ?part tpch:type "ECONOMY ANODIZED STEEL" . filter ((?ord+>tpch:orderdate >= "1995-01-01"^^xsd:date) && (?ord+>tpch:orderdate <= "1996-12-31"^^xsd:date) ) } } } } } order by ?o_year ]]>http://demo.openlinksw.com/tpchsoft/sparql