A location followed by 有 can introduce what is there.

Introductory pattern#

Location + 有 + noun phrase

Worked teaching example#

桌子上有两本书。

There are two books on the table.

Practise the distinction#

Change the location and number of books.

The example and exercise are newly written for this lesson. They do not report an event, interview or study. This introduction covers the displayed use, rather than all constructions involving the same words.

Reference#

Grammar reference. The reference supports the grammar point; no example sentence has been copied from it.