This vast labour force , which may have numbered up to 70,000 men and included the Roman engineering corps , was employed by the victors for construction work in Shushtar , an important agricultural center in south-western Iran .
DET ADJ ADJ NOUN , DET AUX AUX VERB ADP ADP NUM NOUN CCONJ VERB DET ADJ NOUN NOUN , AUX VERB ADP DET NOUN ADP NOUN NOUN ADP PROPN , DET ADJ ADJ NOUN ADP ADJ PROPN .