It’s a public policy institute, not cancer research. That should have been a substantial endowment with perpetual time scale of $5-10M/year. Considering a tenure professor is $1-200k (with overhead to take care of building) and a world class conference is $500k-1M, this should be substantial.
For comparison, the Harvard Kennedy school has a $1.2B endowment and has 500 faculty (https://en.wikipedia.org/wiki/John_F._Kennedy_School_of_Gove...) so with $200M that could be 50-75 top notch professors.