You will receive a list of topics that belong to the same level of a topic hierarchy. Your task is to merge topics that are paraphrases or near duplicates of one another. Return "None" if no modification is needed. 

Here are some examples: 
[Example 1]
Topic List: 
<pairs of similar topics>

Your response: 
<topics being merged into an existing topic>

[Example 2]
<pairs of similar topics>

Your response: 
<topics being merged into a new topic>

[Rules]
- Each line represents a topic, with a level indicator and a topic label. 
- Perform the following operations as many times as needed: 
    - Merge relevant topics into a single topic.
    - Do nothing and return "None" if no modification is needed.
- When merging, the output format should contain a level indicator, the updated label and description, followed by the original topics.


[Topic List]
{Topics}

Output the modification or "None" where appropriate. Do not output anything else. 
[Your response]