Currently, there is only one model of negotiations with Russian leader Vladimir Putin. To do this, we need to use the intermediaries who were involved in the creation of the grain corridor, says Ukrainian President Volodymyr Zelenskyy. When asked by a journalist whether there could be circumstances for Ukraine to negotiate with Putin, Zelenskyy mentioned only one option – a document similar to the grain corridor agreement. “Ukraine can find a model in which solutions can be found. Such a model was first used on the example of the grain corridor, when Ukraine negotiated not with Russia, but wit…