RegEx: Boundary Assertions IV

You've just webscraped a web page and stored it in a string. In the string there is a bullet list of states that voted for President Trump's impeachment:

const str = `
* Texas = no
* California = yes
* Florida = yes
* Michigan = no
`

Add a positive lookahead assertion so a regex match would output the states that voted yes

Notes

• You must use a positive lookahead assertion.
• This is fake data and used only for educational purposes.