sentences:  From there it goes to Bydgoszcz, which had already been connected to Gdańsk and Gdynia (via Laskowice and Tczew), but the creation of Free City of Danzig made it difficult to keep regular Polish freight movement in the interbellum.Thus, another part of the Coal Trunk-Line between Bydgoszcz and Gdynia was constructed in the early 1930s, via Wierzchucin and Kościerzyna and the sparsely populated forests and hills of Kashubia.The Coal Trunk-Line ends in the Baltic Sea port of Gdynia, after crossing all of Poland from south to north (appr.