Pulling out a value from a string

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?

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Try

=MID(A1,SEARCH("TO_Pulse=",A1,1)+9,(SEARCH("&utm",A1,1)-SEARCH("TO_Pulse=",A1,1)-9))

or

=MID(SUBSTITUTE(A1,MID($A1,1,SEARCH("TO_Pulse=",$A1,1)+8),""),1,10)

John,

I guess I missed the mark on that one. Better polish my crystal ball so I can better read the minds of OPs.

Alan