In SIGAda in 2009, who are the authors that published papers about Aircraft systems?
In 2009 in SIGAda, who are the authors that published papers about Aircraft systems?
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/conf/sigada/Sward09a> <https://dblp.org/rdf/schema#authoredBy> ?answer . <https://dblp.org/rec/conf/sigada/Sward09a> <https://dblp.org/rdf/schema#publishedIn> 'SIGAda' . <https://dblp.org/rec/conf/sigada/Sward09a> <https://dblp.org/rdf/schema#yearOfPublication> '2009' }
<https://dblp.org/rec/conf/sigada/Sward09a>