def find_in_list(list_one, list_two):
    """
    Function to find an element from list_one that is in list_two 
    and returns it. Returns None if nothing is found.
    Function taken from A3

    Inputs: 
        list, list
    Outputs: 
        string or None
    """
    
    for element in list_one:
        if element in list_two:
            return element
    return None