How to concatenate unicode strings ???

[Ariel]

Hi everybody, how could I concatenate unicode strings ???
What I want to do is this:

unicode('this an example language ') + unicode('español')

but I get an:
Traceback (most recent call last):
  File "<console>", line 1, in <module>
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 11:
ordinal not in range(128)

How could I concatenate unicode strings ???

Regards
Thanks in advance.
Ariel
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