Task: Pos Tagging
Input (English): Sentence: A massive investigation of the characteristics of in-migrants and prospective out-migrants in Ruanda-Urundi is being carried on by J. J. Maquet , former Director of the Social Science branch of IRSAC , now a professor at l'Universite Officielle Du Congo Belge et {{ Du }} Ruanda-Urundi . 
Word: Du
Output (English): X