3 ms·http://www.cl.cam.ac.uk/~sd601/papers/mov.pdf http://www.cl.cam.ac.uk/~sd601/papers/mov.pdfby jacobwcarlson 11y agohttp://www.cl.cam.ac.uk/~sd601/papers/mov.pdf http://www.cl.cam.ac.uk/~sd601/papers/mov.pdf