Original: The first group , about three-quarters of the total , went to the gas chambers of Auschwitz-Birkenau within a few hours ; they included almost all children , women with children , all the elderly , and all those who appeared on brief and superficial inspection by an SS doctor not to be fully fit .
Simplified: This 66 % generally included all children , all women , all elderly persons , and others whom SS officers thought not fully fit to do work .