sentences:  It was to consist of an L-shaped interferometer, measuring 5 km on each side, with vacuum pipes about 700 mm in diameter.A 2010 developmental roadmap issued by the Gravitational Wave International Committee (GWIC) for the field of gravitational-wave astronomy recommended that an expansion of the global array of interferometric detectors be pursued as a highest priority.In its roadmap, GWIC identified the Southern Hemisphere as one of the key locations in which a gravitational-wave interferometer could most effectively complement existing detectors.