TASK DEFINITION: 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.
PROBLEM: Sentence: They get together periodically to discuss issues of concern to them in relation to regeneration plans . 
 Question: who   get?

SOLUTION: They

PROBLEM: Sentence: In 1638 he defended John Hampden , along with co-counsel Robert Holborne , on his refusal to pay Ship Money , on which occasion he made a notable speech which established him as a leading advocate . 
 Question: who did n't  pay something?

SOLUTION: John Hampden

PROBLEM: Sentence: An `` optical image stabilizer '' , often abbreviated OIS , IS , or OS , is a mechanism used in a still camera or video camera that stabilizes the recorded image by varying the optical path to the sensor . 
 Question: what is  used?

SOLUTION:
a mechanism ### An `` optical image stabilizer '' ### An `` optical image stabilizer '' , often abbreviated OIS , IS , or OS