fixed typo in sparql.rb
fixed typo in sparql.rb

ActiveRDF/ActiveRDF,net7/ActiveRDF,net7/ActiveRDF,ActiveRDF/ActiveRDF,mauriciobomfim/ActiveRDF,mauriciobomfim/ActiveRDF,net7/ActiveRDF,mauriciobomfim/ActiveRDF,ActiveRDF/ActiveRDF,net7/ActiveRDF