Question: William Kong co-produced a Hong Kong/Chinese historical drama war film in what year?
Sentence (from "The Flowers of War"): The Flowers of War () is a 2011 Hong Kong/Chinese historical drama war film directed by Zhang Yimou, starring Christian Bale, Ni Ni, Zhang Xinyi, Tong Dawei, Atsuro Watabe, Shigeo Kobayashi and Cao Kefan.
Relevant evidence: Yes