Question:
Which employer did Mitra Dutta work for in Dec, 1998?

Context:
 Mitra Dutta works for Army Research Office from Sep, 1996 to Jul, 2001. 
 Mitra Dutta works for United States Army Research Laboratory from Apr, 1986 to Sep, 1995. 
 Mitra Dutta works for Purdue University from Sep, 1981 to Apr, 1983.

Answer:
Question:
Which employer did Mitra Dutta work for in Dec, 1998?

Context:
 Mitra Dutta works for Army Research Office from Sep, 1996 to Jul, 2001. 
 Mitra Dutta works for United States Army Research Laboratory from Apr, 1986 to Sep, 1995. 
 Mitra Dutta works for Purdue University from Sep, 1981 to Apr, 1983.

Answer:
user
Army Research Office
assistant
Question:
Which employer did Mitra Dutta work for in Dec, 1998?

Context:
 Mitra Dutta works for Army Research Office from Sep, 1996 to Jul, 2001. 
 Mitra Dutta works for United States Army Research Laboratory from Apr, 1986 to Sep, 1995. 
 Mitra Dutta works for Purdue University from Sep, 1981 to Apr, 1983.

Answer:
user
United States Army Research Laboratory
Purdue University
assistant
Question:
Which employer did Mitra Dutta work for in Dec, 1998?

Context:
 Mitra Dutta works for Army Research Office from Sep, 1996 to Jul, 2001. 
 Mitra Dutta works for United States Army Research Laboratory from Apr, 1986 to Sep, 1995. 
 Mitra Dutta works for Purdue University from Sep, 1981 to Apr, 1983.

Answer:
user
Army Research Office
assistant