A method and a system for extracting information from a natural language text corpus based on a natural language query are disclosed. The method includes coupling a pull-down element to a word line, the pull-down element coupled distal to a word line driver. Each of the remote units transmits an upstream OFDM signal using a multiple access scheme to the host unit demodulator using at least one of a plurality of orthogonal tones within an OFDM waveform.