Original sentence: Construction work began immediately after the World War I.During the World War II at least two aircraft ditched and sank into the lake.For this purpose dives to survey the lakebottom were already underway in 1903.Since prehistorical times the local population has probably felt a close association with the lake, so it was for example usual up until the 18th century to throw consecrated gold coins into the deepest part of the lake
Edited sentence: Construction work began immediately after World War I.During World War II at least two aircraft ditched and sank into the lake.For this purpose, dives to survey the lakebottom were already underway in 1903.Since prehistoric times the local population has probably felt a close association with the lake, so it was for example usual up until the 18th century to throw consecrated gold coins into the deepest part of the lake