Question:
Which position did Guy C. H. Corliss hold in May, 1899?

Context:
 Guy C. H. Corliss holds the position of Chief Justice of the North Dakota Supreme Court from Jan, 1889 to Jan, 1892. 
 Guy C. H. Corliss holds the position of Justice of the North Dakota Supreme Court from Jan, 1889 to Aug, 1898. 
 Guy C. H. Corliss holds the position of law professor from Jan, 1902 to Jan, 1912. 
 Guy C. H. Corliss holds the position of dean from Jan, 1899 to Jan, 1902.

Answer:
dean