Question:
Which employer did Elisabeth Bik work for in May, 1999?

Context:
 Elisabeth Bik works for Netherlands National Institute for Public Health and the Environment from Apr, 1996 to Mar, 1997. 
 Elisabeth Bik works for uBiome from Nov, 2016 to Dec, 2018. 
 Elisabeth Bik works for Stanford University School of Medicine from Apr, 2002 to Oct, 2016. 
 Elisabeth Bik works for St. Antonius hospital from Mar, 1997 to Sep, 2001.

Answer:
Question:
Which employer did Elisabeth Bik work for in May, 1999?

Context:
 Elisabeth Bik works for Netherlands National Institute for Public Health and the Environment from Apr, 1996 to Mar, 1997. 
 Elisabeth Bik works for uBiome from Nov, 2016 to Dec, 2018. 
 Elisabeth Bik works for Stanford University School of Medicine from Apr, 2002 to Oct, 2016. 
 Elisabeth Bik works for St. Antonius hospital from Mar, 1997 to Sep, 2001.

Answer:
user
St. Antonius hospital
assistant
Question:
Which employer did Elisabeth Bik work for in May, 1999?

Context:
 Elisabeth Bik works for Netherlands National Institute for Public Health and the Environment from Apr, 1996 to Mar, 1997. 
 Elisabeth Bik works for uBiome from Nov, 2016 to Dec, 2018. 
 Elisabeth Bik works for Stanford University School of Medicine from Apr, 2002 to Oct, 2016. 
 Elisabeth Bik works for St. Antonius hospital from Mar, 1997 to Sep, 2001.

Answer:
user
Stanford University School of Medicine
uBiome
Netherlands National Institute for Public Health and the Environment
assistant
Question:
Which employer did Elisabeth Bik work for in May, 1999?

Context:
 Elisabeth Bik works for Netherlands National Institute for Public Health and the Environment from Apr, 1996 to Mar, 1997. 
 Elisabeth Bik works for uBiome from Nov, 2016 to Dec, 2018. 
 Elisabeth Bik works for Stanford University School of Medicine from Apr, 2002 to Oct, 2016. 
 Elisabeth Bik works for St. Antonius hospital from Mar, 1997 to Sep, 2001.

Answer:
user
St. Antonius hospital
assistant