Complex sentence: In 1930, Johnson joined the architecture department of the Museum of Modern Art in New York He arranged for American visits by by Gropius and Le Corbusier, and negotiated the first American commission for Mies van der Rohe.
Split into simpler sentences: In 1930, Johnson joined the architecture department of the Museum of Modern Art in New York. There he arranged for American visits by by Gropius and Le Corbusier, and negotiated the first American commission for Mies van der Rohe.