At least two ergs have been recognized by the Magellan probe on Venus : the Aglaonice dune field , which covers approximately , and the Meshkenet dune field ( ~ ) .
ADV ADJ NUM NOUN AUX AUX VERB ADP DET PROPN NOUN ADP PROPN : DET PROPN NOUN NOUN , DET VERB ADV , CCONJ DET PROPN NOUN NOUN ( ~ ) .