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.

Ex Input:
Sentence: A federated identity in information technology is the means of linking a person 's electronic identity and attributes , stored across multiple distinct identity management systems .
Question: what is linking something?

Ex Output:
A federated identity in information technology ### the means

Ex Input:
Sentence: Instead , much of numerical analysis is concerned with obtaining approximate solutions while maintaining reasonable bounds on errors .
Question: when might something obtain something?

Ex Output:
while maintaining reasonable bounds on errors

Ex Input:
Sentence: In November 1982 the Ministry of Education adopted a new authorization criterion , the so-called '' Neighboring Country Clause '' : Textbooks ought to show understanding and seek international harmony in their treatment of modern and contemporary historical events involving neighboring Asian countries .
Question: what involves something?

Ex Output:
their treatment of modern and contemporary historical events