Complex sentence: She had a long friendship with American Under Secretary of State Sumner Welles and thanks to her mediation the 1942 signing of the Fernández-Pierson contract was possible, in which Costa Rica was granted a credit of up to.
Split into simpler sentences: She had a long friendship with American under Secretary of State Sumner Welles and due to her mediation, the 1942 signing of the Fernández-Pierson contract was possible. In which Costa Rica was granted a credit of up to.