Write a Python function to find the common elements between two lists. The function should return a list that contains the common elements.
Example 1:
Input: [1,2,3,4,5], [4,5,6,7,8]
Output: [4,5]
Example 2:
Input: ['apple', 'banana', 'cherry'], ['cherry', 'date', 'elderberry']
Output: ['cherry']