SRL for [replace]: To profit from an index - arbitrage opportunity , someone who owns the S & P 500 widget in New York must sell it and [replace] it with a cheaper S & P 500 widget in Chicago .
ARG-M-PRP: To profit from an index - arbitrage opportunity | ARG-0: someone who owns the S & P 500 widget in New York | ARG-M-MOD: must | ARG-1: it | ARG-2: with a cheaper S & P 500 widget in Chicago