question: Why did the people in the publishing business call 1990 `` The year of Wang Guo zhen '' ?
answer: Because his books sold so well in 1990 .
turker_answer: The people in the publishing business called 1990 , The Year of Wang Guo Zhen , because his books sold so well in 1990 .
rule-based: Did the people in the publishing business call 1990 `` The year of Wang Guo zhen because his books sold so well in 1990 '' .