ベケレ本人も初と言ってるね。
“I am looking forward to my Half-marathon debut. It’s not going to be easy for me as the others have more experience over the distance and yes, I am the newcomer just starting to pursue a serious road running career,” commented Bekele.
http://www.iaaf.org/news/preview/farah-takes-on-bekele-and-gebrselassie-at-gre