sentences:  In the period 1916–22, Nielsen often lived on Funen retreating to the Damgaard and Fuglsang estates, or worked as a conductor in Gothenburg.The period was one of creative crisis for Nielsen which, coinciding with World War I, would strongly influence his Fourth (1914–16) and Fifth symphonies (1921–22), arguably his greatest works according to Fanning.The composer was particularly upset in the 1920s when his long-standing Danish publisher Wilhelm Hansen was unable to undertake publication of many of his major works, including "Aladdin" and "Pan and Syrinx".