Question:
Which employer did Susan J. Smith work for in Dec, 2007?

Context:
 Susan J. Smith works for Girton College from Jan, 2009 to Dec, 2022. 
 Susan J. Smith works for Durham University from Jan, 2004 to Jan, 2009. 
 Susan J. Smith works for University of Cambridge from Jan, 2010 to Dec, 2022. 
 Susan J. Smith works for University of Edinburgh from Jan, 1990 to Jan, 2004.

Answer:
Durham University