测试场景：给出一个 200 行的混乱 Python 爬虫脚本，要求重构为面向对象结构，并输出 Mermaid 类图。
"We saw the news that this rocket had crashed into Poland. It had flown almost directly over us, and we thought, 'oh, this is a great chance'", explained Prof Robin Wing at the Leibniz Institute of Atmospheric Physics in Germany.
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FirstFT: the day's biggest stories。关于这个话题，谷歌浏览器【最新下载地址】提供了深入分析
func extract3(c chan task) []task {