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


question:
Sentence: Until the early 1980s , broadcasting in South Africa was state controlled - the sole broadcaster being the SABC . 
 Question: what was  controlled?
answer:
broadcasting


question:
Sentence: A nonsurgical alternative involves the use of a miotic to constrict the pupil and prevent the lens from luxating into the anterior chamber . 
 Question: what is  constricted?
answer:

the pupil