(1) Whether PetroSA holds any rights to the exploitation of shale gas basins; if not, why not; if so, what are the relevant details; (2) whether PetroSA is a shareholder in and/or partner of any company holding rights to the exploitation of shale gas basins; if not; why not; if so, (i) which companies and (ii) what are the details with regard to (aa) the size of shareholdings and (bb) partnership agreements; (3) what (a) are the reserve estimates per cubic metre and (b) estimated lifespan of the shale gas basins PetroSA has rights on?