London, (ANI): John Lennon's widow Yoko Ono is all set to judge a haiku contest in London. Haiku is a form of Japanese poetry consisting of seventeen syllables. Londoners have been challenged to write a haiku about the British summer, and post it on their Twitter.com accounts by May 22.

And Ono, who hails from Japan, will get to decide the winning poem, reports the Daily Express. The winner's poem will be displayed at the city's King's Cross Station.