How to join two strings from different tuples but in the same index using Python?

Question

The tuples inside the file:

 (\'Wanna\', \'O\')
 (\'be\', \'O\')
 (\'like\', \'O\')
 (\'Alexander\', \'B\')
 (\'Coughan\', \'I\')
 (\'?\', \'O\')

Answer 1

I'll extend the input data to include more 'B' + 'I' examples.

phrases = [('Wanna', 'O'),
    ('be', 'O'),
    ('like', 'O'),
    ('Alexander', 'B'),
    ('Coughan', 'I'),
    ('One', 'B'),
    ('Two', 'I'),
    ('Three', 'B')]

length = len(phrases)
res = ['%s %s' % (phrases[i][0], phrases[i + 1][0])
    for i in range(length)
    if i < length - 1 and phrases[i][1] == 'B' and phrases[i + 1][1] == 'I']
print(res)

The result is:

['Alexander Coughan', 'One Two']