I wrote a script in python that takes the link of the wiki transcript as an input and then gives you a plaintext version of the transcript in a text file as the output. I hope this helps with your project.
from pycurl import *
import cStringIO
import re
link = raw_input("Link to transcript: ")
filename = link.split("/")[-1]+".txt"
buf = cStringIO.StringIO()
c = Curl()
c.setopt(c.URL, link)
c.setopt(c.WRITEFUNCTION, buf.write)
c.perform()
html = buf.getvalue()
buf.close()
Speaker = ""
SpeakerPositions = [m.start() for m in re.finditer(':</b>', html)]
file = open(filename, 'w')
for x in range(0, len(SpeakerPositions)):
if html[SpeakerPositions[x] + 5] != "<":
searchpos = SpeakerPositions[x] - 1
char = ""
while char != ">":
char = html[searchpos]
searchpos = searchpos - 1
if char != ">":
Speaker += char
Speaker = Speaker[::-1]
Speaker += ": "
searchpos = SpeakerPositions[x] + 5
char = ""
while char != "<":
char = html[searchpos]
searchpos = searchpos + 1
if char != "<":
Speaker += char
Speaker = Speaker.replace(" ", "")
file.write(Speaker + "\n")
Speaker = ""
file.close()