polder out of a lake. It worked well and it resulted among many others in the polder of the Buikslotermeer.
As the city of Amsterdam grew in size, a new part was called after the old polder.
Wikidata needs disambiguation between the two. One of the reasons is that a picture like this one, is about the polder and not at all about the neighbourhood of Amsterdam.
The polder will have statements about things like when the dikes broke.