Co-op and Sand dunes

Co-op noun - A jointly owned commercial enterprise (usually organized by farmers or consumers) that produces and distributes goods and services and is run for the benefit of its owners.

Sand dunes and co-op are semantically related. In some cases you can use "Sand dunes" instead a noun phrase "Co-op".

Co-op and sand dunes are semantically related. Sometimes you can use "Co-op" instead a noun phrase "Sand dunes".