You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
2008_Sichuan_earthquake

Context:
In the China Digital Times an article reports a close analysis by an alleged Chinese construction engineer known online as “Book Blade” (书剑子), who stated:

Question:
Who was the construction engineer known as?

Book Blade