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.

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?
A federated identity in information technology ### the means

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   made something?
he ### John Hampden

Sentence: As ionospheric conditions and mobile-node locations change , these quality tuples will shift . 
 Question: when will something shift?

As ionospheric conditions and mobile-node locations change