Pulling out a value from a string

[kimi01]

I have a column that contains values like the below. They are consistently formatted in this way.

example.org/portal/TO_Pulse?key=01fb3df8-77f4-4eef-b39c-8e935ec45189&TO_Pulse=Not+Likely&utm_campaign=example&utm_source=example&utm_medium=example

In a separate cell I need to pull out the value that comes after &TO_Pulse and before the following ampersand.

So I'd want to return the value "Not Likely".

What formula would I need to do that please?