Task: Question Answering
Input (English): Process:  -Stars burn mass -The star burns until it runs out of fuel -The star can no longer support its weight -The layers of hydrogen press down on the core -The core gets smaller and smaller under the pressure -The pressure causes gravity to get stronger -The gravity becomes so powerful that nothing can escape it -Anything that gets close to it, is drawn into it by its gravity -Light is drawn into it -Light can not escape -
 Question: What is the effect of the air is contaminated on pressure causes gravity to get more strong.?
Output (English): none