In this task, you are given a sentence and question which can be answered using the sentence. Your task is to answer the question using the information from the sentence. The answer to the question is unique and it is a continuous text span from the sentence.
--------
Question: Sentence: The storm caused extensive damage to West Edmonton Mall ; a small glass section of the roof collapsed under the weight of the rainwater , causing water to drain onto the mall 's indoor ice rink . 
 Question: what did something cause?

Answer: extensive damage to West Edmonton Mall


Question: Sentence: This technology is implemented in the lens itself , or by moving the sensor as the final element in the optical path . 
 Question: when is something moved?

Answer: as the final element in the optical path


Question: Sentence: Like virtually all Seattle neighborhoods , the Pioneer Square neighborhood lacks definitive borders . 
 Question: what does something lack?

Answer:
definitive borders