Question:
Which employer did Sylvia Burwell work for in May, 2008?

Context:
 Sylvia Burwell works for Bill & Melinda Gates Foundation from Jan, 2001 to Jan, 2011. 
 Sylvia Burwell works for Walmart from Jan, 2012 to Jan, 2013. 
 Sylvia Burwell works for American University from Jan, 2017 to Dec, 2022.

Answer:
Question:
Which employer did Sylvia Burwell work for in May, 2008?

Context:
 Sylvia Burwell works for Bill & Melinda Gates Foundation from Jan, 2001 to Jan, 2011. 
 Sylvia Burwell works for Walmart from Jan, 2012 to Jan, 2013. 
 Sylvia Burwell works for American University from Jan, 2017 to Dec, 2022.

Answer:
user
Bill & Melinda Gates Foundation
assistant
Question:
Which employer did Sylvia Burwell work for in May, 2008?

Context:
 Sylvia Burwell works for Bill & Melinda Gates Foundation from Jan, 2001 to Jan, 2011. 
 Sylvia Burwell works for Walmart from Jan, 2012 to Jan, 2013. 
 Sylvia Burwell works for American University from Jan, 2017 to Dec, 2022.

Answer:
user
American University
Walmart
assistant
Question:
Which employer did Sylvia Burwell work for in May, 2008?

Context:
 Sylvia Burwell works for Bill & Melinda Gates Foundation from Jan, 2001 to Jan, 2011. 
 Sylvia Burwell works for Walmart from Jan, 2012 to Jan, 2013. 
 Sylvia Burwell works for American University from Jan, 2017 to Dec, 2022.

Answer:
user
Bill & Melinda Gates Foundation
assistant