I am worrying in python, and I've a list composed by 8 sublists, made in this way: [[value1,value2,value3], ...].

I want to change to "False" only the third value (value3) in all sublists using a list comprhension, but my code does not work, and a I don't know why.

```py
[[a, b, False] for a, b, _ in athlete_session_el['top_bottom_first']]

```

`athlete_session_el['top_bottom_first']` is the list of sublists.