Read the following premise and answer if the hypothesis is true.
Daniel Kaufmann is the president and CEO of the Natural Resource Governance Institute, formerly the Revenue Watch Institute - Natural Resource Charter. Previously, he was a senior fellow at the Brookings Institution. He remains a nonresident senior fellow at Brookings. Prior to that, he was a director at the World Bank Institute, leading work on governance and anti-corruption.
Hypothesis: Daniel Kaufmann has fought corruption at the grassroots level.. Is the answer "Yes", "No", or "It's impossible to say"? Respond with only the answer and no additional text.
It's impossible to say
It's impossible to say.