SELECT
  ?res, ?visitDate, ?len
WHERE
  (?res, <proxymeta:visits>, ?visitsBag),
  (?visitsBag, ?li, ?visitDetails),
  (?visitDetails, <proxymeta:responseHeaders>, ?hdrs),
  (?visitDetails, <dc:date>, ?visitDate),
  (?hdrs, <headers:httpContentType>, "image/gif"),
  (?hdrs, <headers:httpContentLength>, ?len)
AND
  ?len > 10000
USING 
  proxymeta FOR <http://www.decafbad.com/2003/01/proxymeta#>, 
  headers FOR <http://www.decafbad.com/2003/01/httpheaders#>,
  rdf FOR <http://www.w3.org/1999/02/22-rdf-syntax-ns#>,
  dc FOR <http://purl.org/dc/elements/1.0/>