Complex sentence: In 1955 he partecipated in the exhibition, curated by Andrew Ritchie, The New Decade: 22 European Painters and Sculptors, which travelled throughout the U.S.A, and in first Documenta at Kassel.
Split into simpler sentences: In 1955 he partecipated in the exhibition "The New Decade: 22 European Painters and Sculptors", curated by Andrew Ritchie. The exhibition travelled throughout the U.S.A, and at the first Documenta at Kassel.