Match everything delimited by another regex?

Question

I\'m currently trying to make a regex that will find all the sentences in a block of text, and so far I\'ve got this;

(?=(?

        

Answer 1

(Moved from your closed newer question)
In your case, the lookbehinds should come before the periods.
Condensing your expression, it is

Update - Between it you could just split discarding delimiters

 # (?:(?

Or, split keeping delimiters

 # ((?:(?