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.
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Question: Sentence: As ex-slaves risked beatings for failing to meet the continuing duties , their freedom was limited . 
 Question: what might someone fail  to do?

Answer: meet the continuing duties


Question: Sentence: Instead , much of numerical analysis is concerned with obtaining approximate solutions while maintaining reasonable bounds on errors . 
 Question: what is  concerned?

Answer: much of numerical analysis


Question: Sentence: Green is also a significant color , symbolizing the union of the three colors . 
 Question: what   symbolizes something?

Answer:
Green