( a ) Third session of the Team of Specialists on Public-Private Partnerships ( TOS-PPP ) , 18-19 April 2011 ; ( b ) Fourth session of the TOS-ICP , 12-13 May 2011 ; ( c ) Fifth session of the Team of Specialists on Intellectual Property ( TOS-IP ) , 6-8 July 2011 ; ( d ) Fourth session of the SPECA Project Working Group on Knowledge-based Development , Baku , Azerbaijan , second half of 2011 .