Teacher:Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Teacher: Now, understand the problem? Solve this instance: In late 1911, she worked as a secretary for Sun Yat-sen, a job later succeeded by her sister, Soong Ching-ling, who later became Madame Sun Yat-sen. Soong Ai-ling met her future husband, Kung Hsiang Hsi, in 1913, and married the following year in Yokohama.
Student:
Which woman was the sister of Soong Ai-ling?