Question: What is the average salary of an Engineering Technician in Washington DC?
SPARQL:
select avg(xsd:decimal(?amount)) from <http://linkedspending.aksw.org/dc-city-salaries> { ?obs qb:dataSet ls:dc-city-salaries. ?obs lso:dc-city-salaries-amount ?amount. ?obs lso:dc-city-salaries-position "Engineering Technician". }