Iran has an estimated one million drug addicts and is a key transit route for drugs , mostly opium , smuggled to Europe through Afghanistan and Pakistan -- the so called " Golden Crescent . "
<response> <location>Iran</location> has an estimated one million drug addicts and is a key transit route for drugs , mostly opium , smuggled to <location>Europe</location> through <location>Afghanistan</location> and <location>Pakistan</location> -- the so called " <organization>Golden Crescent</organization> . " </response>