The first person to interpret Relational quantum mechanics has worked in what countries? 
Relational quantum mechanics:  This interpretation was first delineated by Carlo Rovelli in a 1994 preprint, and has since been expanded upon by a number of theorists. Carlo Rovelli: 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.
Italy, the United States and since 2000, in France