Three Mills Residential Moorings is a community of twenty residential narrowboats moored on the Three Mills Wall River Weir near Three Mills in the East End of London. Historically a tidal stretch of water, the residential moorings were converted to non-tidal in preparation for the London 2012 Olympics by the construction of a weir Using only the above description and what you know about the world, "The Three Mills Residential Moorings were converted before the London 2012 Olympics." is definitely correct, incorrect, or inconclusive? 