rdf - How to integrate several SPARQL queries -

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this query:

prefix pizza: <http://www.data.gov/semantic/data/alpha/1458/dataset-1458.rdf#> prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> prefix dgtwc: <http://data-gov.tw.rpi.edu/2009/data-gov-twc.rdf#> prefix xsd: <http://www.w3.org/2001/xmlschema#>  select ?chem  <http://ontomatica.com/public/ontologies/dataset-1458.rdf> {     ?s dgtwc:uses_property ?chem .     filter (regex(str(?chem), '.*sel.*')) . }

produces result

this query:

prefix pizza: <http://www.data.gov/semantic/data/alpha/1458/dataset-1458.rdf#> prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> select ?method <http://ontomatica.com/public/ontologies/dataset-1458.rdf> {     ?s rdfs:label ?method     filter regex(?method, 'selenium', 'i')     }

produces result

for <rdf:description rdf:about="#entry6483">, how write query produce result?

------------------------------------------------------ | chem           | method                 | selenium | ====================================================== | pizza:selenium | "selenium (mcg/100 g)" | 9        | ------------------------------------------------------

give have entryno "entry6483"

how about

prefix pizza: <http://www.data.gov/semantic/data/alpha/1458/dataset-1458.rdf#> prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> prefix dgtwc: <http://data-gov.tw.rpi.edu/2009/data-gov-twc.rdf#> prefix xsd: <http://www.w3.org/2001/xmlschema#>  prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> select ?chem ?method ?selenium <http://ontomatica.com/public/ontologies/dataset-1458.rdf> {      pizza:entry6483 ?chem ?selenium .     ?chem rdfs:label ?method .     filter regex(?method, 'selenium', 'i')  }

not sure if looking for!


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