I've got some rows in Google Sheets that contain strings. I want to extract certain parts from this string and enter them into another cell:  

specifically, **I want to extract words/names that begin with the character "@"**. 

For example in the string "Hello @Henry how are you" I want the next cell along to display only "@Henry", removing all the other words.

There are also cases when there are multiple names beginning with @ and I would want all of these returned (preferably in separate columns). 

Can anyone help me with this?

**Edit:** dummy spreadsheet below:

<https://docs.google.com/spreadsheets/d/1TupcKRHHi94Q3OLmZS0-eEWNwbEZF90gjymoyem3GFI/edit?usp=sharing>