a='''
[Scene: Central Perk, Chandler, Joey, Phoebe, and Monica are there.]
Monica: There's nothing to tell! He's just some guy I work with!
Joey: C'mon, you're going out with the guy! There's gotta be something wrong with him!
Chandler: All right Joey, be nice.? So does he have a hump? A hump and a hairpiece?
Phoebe: Wait, does he eat chalk?
[Scene: Chandler, Joey,abcsde.]
Phoebe: Just, 'cause, I don't want her to go through what I went through with Carl- oh!
Monica: Okay, everybody relax. This is not even a date. It's just two people going out to dinner and- not having sex.
Chandler: Sounds like a date to me.
[Scene: Joey.]
'''

I have a text a, as above,
I want to get the dialogue text of each scene and save it as lsit. The difference between each scene is [Scene: Add an English sentence.], as shown in bold# above ##Then use regular expressions to write,
paragraphs = re.findall('[Scene: w .](.*?)[Scene: w .]',a,re.S)

What is the reason for the error? How to match the dialogue content of each scene?
Thanks.