In this task, you will be shown an incorrect English sentence. You need to generate a corrected form of the input sentence.

Input: Consider Input: When you understand the concepts and ideas is up to you to prove them , to see if they are really what you have been told , i think this is the main reason why students prefere facts rather than just understanding ideas and concepts .

Output: When you understand the concepts and ideas it is up to you to prove them , and see if they are really what you have been told ; I think this is the main reason why students prefer facts rather than just understanding ideas and concepts .

Input: Consider Input: A perfect example of Real Politik was when Bismarck manipulated the letter written by the king and sent it to the French emperor Napoleon III .

Output: A perfect example of realpolitik was when Bismarck manipulated the letter written by the king and sent it to the French emperor Napoleon III .

Input: Consider Input: While air travel has increased in recent years , there has been no decrease in car travel or car sales .
Output: While air travel has increased in recent years , there has been no decrease in car travel or car sales .