This is pretty self-explanatory - what if the area surrounding Vilnius/Wilno doesn't wind up controlled by Poland, Lithuania, or Belarus, but instead is made independent after WW1? Perhaps the Great Powers decide that the best way to resolve the dispute is to make the region independent. What would be the implications of this? Lithuania doesn't have its historical capital, of course, but Poland doesn't have it either. Would an independent Vilnius last, or would it get gobbled up by one of the three countries claiming it?