Northern Marmara and Değirmenköy (Silivri) Depleted Gas Reservoir
... that the Northern Marmara and Değirmenköy (Silivri) Depleted Gas Reservoir is currently the only operational underground natural gas storage facility in Turkey?
... that the <b id="mwA-M"><a href="./Northern_Marmara_and_Değirmenköy_(Silivri)_Depleted_Gas_Reservoir" id="mwA-Q" rel="mw:WikiLink" title="Northern Marmara and Değirmenköy (Silivri) Depleted Gas Reservoir">Northern Marmara and Değirmenköy (Silivri) Depleted Gas Reservoir</a></b> is currently the only operational underground <a href="./Natural_gas_storage" id="mwA-U" rel="mw:WikiLink" title="Natural gas storage">natural gas storage</a> facility in Turkey?