question: What has been the focus since 2011
answer: Their grant-making focus has been since 2011 on sanitation science and technology ( `` transformative technologies '' )
turker_answer: Their grant-making focus has been since 2011 on sanitation science and technology ( `` transformative technologies '' ) .
rule-based: The has been focus their grant-making focus has been since 2011 on sanitation science and technology ( `` transformative technologies '' since 2011