Question: The first person to interpret Relational quantum mechanics has worked in what countries? 

Related documents: [0]  [DOC] Relational quantum mechanics (RQM) is an interpretation of quantum mechanics which treats the state of a quantum system as being observer-dependent, that is, the state "is" the relation between the observer and the system. This interpretation was first delineated by Carlo Rovelli in a 1994 preprint, and has since been expanded upon by a number of theorists. It is inspired by the key idea behind special relativity, that the details of an observation depend on the reference frame of the observer, and uses some ideas from Wheeler on quantum information. [END] 
[1]  [DOC] Carlo Rovelli (born 3 May 1956) is an Italian theoretical physicist and writer who has worked in Italy, the United States and since 2000, in France. His work is mainly in the field of quantum gravity, where he is among the founders of the loop quantum gravity theory. He has also worked in the history and philosophy of science. He collaborates regularly with several Italian newspapers, in particular the cultural supplements of "Il Corriere della Sera", "Il Sole 24 Ore" and "La Repubblica". [END]  
Answer: Italy, the United States and since 2000, in France
Italy, the United States and since 2000, in France