regex pattern for a reference point

Using regex in python, I want to find a regex pattern and make the pattern a reference point for the text that follows. Then when the pattern is found again, it begins another record with the second-found-pattern as a reference point for everything that follows until the next pattern and its records.

I have been studying search, findall, and match, and group(), but I can't seem to find out how to do this. I know this isn't a perfect question, but I'm a noob. Thanks for any direction.