You will be given a definition of a task first, then some input of the task.
Indicate a text span in the passage about which an inquisitive question is asked. (note, don't answer the question).

Sentence: GM is under intense pressure to close factories that became unprofitable as the giant auto maker ' s U . S . market share skidded during the past decade .<sep>Question: What caused the market share to skid?
Output:
market share skidded