world relationships so the Skip Graham model was already introduced by mclubbe in an earlier paper that came out I believe not like one or two months prior to this one as I said where to veck is a series of papers I don't think there is a paper called were to vector they here have released the code along with the with the paper in the code was called - vac so the Skip Graham model was introduced previously but it is replicated right here so this in the Skip Graham model what you're trying to do is you're trying to get a distributed