Complex sentence: Eric Sinclair Traill (1904--31 January 1981) was a British publisher, chief editor, and music critic of jazz that began in 1946, when he launched "Pick Up" as a locus for serious jazz criticism in Britain.
Split into simpler sentences: Eric Sinclair Traill (1904--31 January 1981) was a British publisher, chief editor, and music critic of jazz. He career began in 1946, when he launched "Pick Up" as a locus for serious jazz criticism in Britain.