<prompt> Translate the following text to SwahiliThe oldest construction on Formentera a dolmen, or prehistoric stone circle lies not far from Es Pujols at Ca Na Costa between the La Sabina road and Formenteras salt lake.  <response>: Mzunguko wa mawe ya kale zaidi ya Formentera, au dolmen, iko karibu na Es Pujols huko Ca Na Costa kati ya barabara ya La Sabina na ziwa la chumvi la Formentera. 