human
Write me a the Python code you requested given the following:
I am working on the file "Chapter6/6-Linked_Structures.ipynb".
The first task is:
Since we did not define a method to show the value stored, we cannot see the value. However the values we passed to each variable is stored. 

Now to make it a linked list, we have to establish a connection. To achieve this we can add another data field called next into our constructor.
Can you write Python code for it?
assistant
#Here is the Python code you requested.

class ListNode:
    def __init__(self, data):
        self.data = data
        self.next = None

# Initial creation of nodes
a = ListNode(11)
b = ListNode(52)
c = ListNode(18)