You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, you will be shown an incorrect English sentence. You need to generate a corrected form of the input sentence.

The car's wheel are loose.
Solution: The car's wheel is loose.
Why? The instance of are is replaced by the word is. This makes the sentence grammatically correct.

New input: On the other hand each academic field needs specialists in order to progress . 
Solution:
On the other hand , each academic field needs specialists in order to progress . 