The conversation between human and AI assistant.
[|Human|] Generate an appropriate explanation to the comment in the code.
[|AI|] This appears to be the declaration of a function called `tweet_id_extraction` which takes in an input parameter named `tweet`. However, the function is incomplete and the code inside the function has not been implemented yet. The comment "# TODO: Explain what is going on here" is a placeholder for an explanation on the steps and processes that are to be implemented within the function, presumably to extract the id of a given tweet.
[|Human|] 
Generate an appropriate explanation to the comment in the code.