Complex sentence: However, there was no further interest in this project until 1841, when cooperation with Industriforeningen had been established; after substantial financial recalculations, in 1843, they applied for a concession to construct a railway from Copenhagen via Roskilde to a coastal town on West Zealand.
Split into simpler sentences: However, there was no further interest in this project until 1841, when cooperation with Industriforeningen had been established. In 1843, after substantial financial recalculations, they applied for a concession to construct a railway from Copenhagen via Roskilde to a coastal town on West Zealand.