Question:
Which employer did Ian Oliver work for in May, 1999?

Context:
 Ian Oliver works for Grampian Police from Jan, 1990 to Jan, 1998. 
 Ian Oliver works for Teesside University from Jan, 1999 to Jan, 2003. 
 Ian Oliver works for Central Scotland Police from Jan, 1979 to Jan, 1990. 
 Ian Oliver works for Northumbria Police from Jan, 1977 to Jan, 1979.

Answer:
Question:
Which employer did Ian Oliver work for in May, 1999?

Context:
 Ian Oliver works for Grampian Police from Jan, 1990 to Jan, 1998. 
 Ian Oliver works for Teesside University from Jan, 1999 to Jan, 2003. 
 Ian Oliver works for Central Scotland Police from Jan, 1979 to Jan, 1990. 
 Ian Oliver works for Northumbria Police from Jan, 1977 to Jan, 1979.

Answer:
user
Teesside University
assistant
Question:
Which employer did Ian Oliver work for in May, 1999?

Context:
 Ian Oliver works for Grampian Police from Jan, 1990 to Jan, 1998. 
 Ian Oliver works for Teesside University from Jan, 1999 to Jan, 2003. 
 Ian Oliver works for Central Scotland Police from Jan, 1979 to Jan, 1990. 
 Ian Oliver works for Northumbria Police from Jan, 1977 to Jan, 1979.

Answer:
user
Grampian Police
Central Scotland Police
Northumbria Police
assistant
Question:
Which employer did Ian Oliver work for in May, 1999?

Context:
 Ian Oliver works for Grampian Police from Jan, 1990 to Jan, 1998. 
 Ian Oliver works for Teesside University from Jan, 1999 to Jan, 2003. 
 Ian Oliver works for Central Scotland Police from Jan, 1979 to Jan, 1990. 
 Ian Oliver works for Northumbria Police from Jan, 1977 to Jan, 1979.

Answer:
user
Teesside University
assistant