By Pavel Polityuk and Silvia Aloisi KYIV (Reuters) – Ukraine is seeking ways to get grain and vegetable oils out of the country by breaking a months-long blockade of the Sea of Azov and the Black Sea by the Russian navy and moving more by land. The war, together with Western sanctions against Russia, have sent the price of grain, cooking oil, fertiliser and energy soaring. That in turn is threatening a global food crisis as many countries count on Russia and Ukraine for more than half of their wheat imports, including some of the poorest. Russia and Ukraine together account for nearly a third …