Andy works on infrastructure for linked data graph systems. He was lead editor for SRARQL, the RDF Query Language. Andy developed the ARQ query engine which is released as part of Apache Jena where he is a committer. He has spoken at conferences and at developer events about linked data and RDF. Andy has given tutorials on SPARQL at the International Semantic Web Conference (invited), at the Semantic technologies Conference and teaches courses on SPARQL, both public and commercial. Paolo works as a Systems Engineer at Cloudera and previous he worked at HP Labs in the semantic web research group. Paolo is a PMC member and committer of the Apache Jena project. He is 'addicted' to data, especially graph data. Paolo has given talks on graph data at ApacheCon and Strata London.