hello, i'm christian fraser. you're watching the context on bbc news. the un's secretary general heads to ukraine to secure a crucial grain deal that could have major implications for the global food crisis. the deal with russia that allows ukraine to export its grain must be renewed by 18 march, but there's concern the kremlin will refuse to renew it. thousands are on the streets of georgia, for the second night running, protesting against a new law that could derail the country's aspirations to join the eu. and the bbc�*s gary lineker says he will continue to speak out for those with no voice, after his criticisms tonight with the context — the independent trade economist rebecca harding, and emmy—nominated journalist caroline modarressy—tehrani.