I need to find the latest occurence of 'start: some text here stop:' from the unknown length string.
'something start: some text stop: other text here start: again something stop: may be some text here start: and finally stop: and maybe something here'
I would like to get the last start:<...>stop: pair and group the text between them ('and finally' in this example). Strings 'start:' and 'stop:' will be unique so that there is always a pair or them and 'some text' between them doesn't include those strings.