|This work is in the public domain because, according to Article 21 and 23 of Decreto-Lei n.º 43/99/M of Macao Special Administrative Region of the People's Republic of China, the Copyright of this work had expired in Macau. This is either because the period of 50 years from the end of the calendar year in which the author dies had already ended, or the work is of unknown authorship and the period of 50 years from the end of the calendar year in which the work was first made has ended. Please also see Wikipedia:Copyrights.
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