SRL for [underestimated]: John Wetherell , a Lloyd 's underwriter , says he and his fellow underwriters [underestimated] by as much as 50 % the premiums they should have charged for property risks from 1980 to 1985 .
ARG-0: he and his fellow underwriters | ARG-2: by as much as 50 % | ARG-1: the premiums they should have charged for property risks from 1980 to 1985