Complex sentence: He was one of the five founders of the Photography Centre of Athens (PCA) in 1979; the PCA was the first Greek institution devoted to creative photography, and as such a seminal focus for photographers of next generations.
Split into simpler sentences: He was one of the five founders of the Photography Centre of Athens (PCA) in 1979. The PCA was the first Greek institution devoted to creative photography, and as such a seminal focus for photographers of next generations.