strip() 2.4.4

[Nick]

strip() isn't working as i expect, am i doing something wrong -

Sample data in file in.txt:

'AF':'AFG':'004':'AFGHANISTAN':'Afghanistan'
'AL':'ALB':'008':'ALBANIA':'Albania'
'DZ':'DZA':'012':'ALGERIA':'Algeria'
'AS':'ASM':'016':'AMERICAN SAMOA':'American Samoa'


Code:

f1 = open('in.txt', 'r')

for line in f1:
    print line.rsplit(':')[4].strip("'"),

Output:

Afghanistan'
Albania'
Algeria'
American Samoa'

Why is there a apostrophe still at the end?

Thanks in advance.
Nick