sentences:  In addition the company built up a surplus of ore. Henrik Lund took a study trip to the United States in 1916, where he visited more than twenty cities and brought a series of innovations with him back.Wiull quit in 1917 and was replaced by Johan Knudtzen.In the aftermath of World War I, Norway was not permitted to export more than 133,624 tonnes of iron ore to Germany per year, of which Sydvaranger was issued a quota of 65,000.