title: extraction blanks
design: extraction blanks were created: s_1_ESUEB5 - Created August 8th 2008 at McMaster University s_1_ESEB6 - Created August April 1/2 2009 at McMaster University s_1_ESEB7 - Created April 7/8 2009 at McMaster University s_1_ESEB8 - Created March 2010 at the Max Plank Institute for Evolutionary Anthropology  