- affiliations:
  - name: University of Zurich
  - name: Humboldt University of Berlin
  - name: Kaiser Wilhelm Institute for Physics
  family_name: Einstein
  given_name: Albert
  id: gnd:118529579
  identifiers:
  - identifier: gnd:118529579
    scheme: gnd
- affiliations:
  - name: University of Cambridge
  - name: California Institute of Technology
  - name: University of Oxford
  family_name: Hawking
  given_name: Stephen
  id: 0000-0002-9079-593X
  identifiers:
  - identifier: https://orcid.org/0000-0002-9079-593X
    scheme: orcid
