Here is a string in which I would like to extract the file name part from it, but I’m not capable of it. So please help me.

This is the string, there are many many similar string like below:
![A it's correlated with x.](C:/Users/someone/Pictures/the another variable z into consideration.png)

And this is the file name part I want:
the another variable z into consideration.png

I tried “” and ””” quorate the string, and I tried grep -oP and sed, but I think the problem is the string problem