Question:
Which employer did Sylvia Burwell work for in Mar, 2012?

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

Answer:
Question:
Which employer did Sylvia Burwell work for in Mar, 2012?

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

Answer:
user
Walmart
assistant
Question:
Which employer did Sylvia Burwell work for in Mar, 2012?

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

Answer:
user
American University
Bill & Melinda Gates Foundation
assistant
Question:
Which employer did Sylvia Burwell work for in Mar, 2012?

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

Answer:
user
Walmart
assistant