Detailed Instructions: Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
Problem:Context: Adolphe Lechaptois (8 June 1852 -- 30 November 1917) was a priest of the White Fathers missionary society who was Vicar Apostolic of Tangyanika from 1891 until his death in 1917, in what is now Tanzania.
Question: What group was Adolphe Lechaptois a member of?
Solution:
white fathers