Select query in README doesn't trigger execute()

[moustaki]

Going through the SELECT example in the README, I noticed execute() wasn't being triggered. The example in the README therefore returns an empty array.

require 'sparql/client'
sparql = SPARQL::Client.new("http://dbpedia.org/sparql")
query = sparql.select.where([:s, :p, :o]).offset(100).limit(10)
query.each_solution do |solution|
  puts solution.inspect
end