The Marais district, north of the two islands in the river, was built on land reclaimed from the marshes.
The land was taken back from the marshes, and was used to build the Marais district.
mnli hypothesis: The land was taken back from the marshes, and was used to build the Marais district. premise: The Marais district, north of the two islands in the river, was built on land reclaimed from the marshes.