Teacher: Write an inquisitive question about a specific text span in a given sentence such that the answer is not in the text.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Sentence: The Obama administration is developing additional screening protocols for airline passengers both overseas and in the United States to control infectious diseases such as Ebola, President Barack Obama said Monday .<sep>Span: Obama administration
Solution: What was the duration of the Obama administration?
Reason: It is an inquisitive question based on the specific span of the sentence.

Now, solve this instance: Sentence: More than 100 bridges would be lost , power lines toppled and coastal towns isolated .<sep>Span: coastal towns isolated
Student:
Why are they isolated?