Not a DOI
The resolution service at https://doi.org resolves DOIs. You have attempted to resolve giving_op/birman-fellowship-fund, which is not a DOI.
giving_op/birman-fellowship-fund may be a Handle (DOIs are a special sort of Handle). If giving_op/birman-fellowship-fund is a valid Handle you should be able to resolve it at https://hdl.handle.net.
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