I want to know the answer to the following question:
How soon after the earthquake was Premier Wen Jiabao on his way to the area?
All the background I'm provided with is that "Just 90 minutes after the earthquake, Premier Wen Jiabao, who has an academic background in geomechanics, flew to the earthquake area to oversee the rescue work.". Is that enough to answer the question?
Answer: yes