SRL for [zapping]: This is not only because it kills the unborn , a job at which it actually is not outstandingly efficient , [zapping] only 50 % to 85 % of them depending on which study you read ( prostaglandin , taken in conjunction with the pill , boosts the rate to 95 % ) .
ARG-0: it | ARG-1: only 50 % to 85 % of them