Complex sentence: In 1974 he studied Art in Paris but in 1975 returned to the gallery and cofounded, with his brother Eric, a fine-art evaluation, restoration and framing service, Services D'Art Klinkhoff (1975-1983).
Split into simpler sentences: In 1974 he studied Art in Paris and returned to the gallery in 1975. He also cofounded, with his brother Eric, a fine-art evaluation, restoration and framing service, Services D'Art Klinkhoff (1975-1983).