Complex sentence: By the late 60s he had already achieved international recognition for his work and was included in the 1968 "Word & Image" exhibition at the Museum of Modern Art in New York, four years later MoMA mounted a solo exhibition of his graphic work.
Split into simpler sentences: By the late 60s he had already achieved international recognition for his work and was included in the 1968 "Word & Image" exhibition at the Museum of Modern Art in New York. Four years later MoMA mounted a solo exhibition of his graphic work.