 The list of prisoners to be released was based on previous work conducted by German and Egyptian mediators and coordinated by Bundesnachrichtendienst agent Gerhard Conrad, was signed in Egypt on 11 October 2011.Its first phase was executed on 18 October 2011, with Israel releasing 477 Palestinian prisoners and Hamas transferring Shalit to Cairo.In the second phase, which took place during December 2011, another 550 prisoners were released.