The aircraft had entered service with Imperial Airways in May 1931 and having served for a time with Iraq Petroleum Transport Co . , it had returned to Imperial Airways .
DET NOUN AUX VERB NOUN ADP PROPN PROPN ADP PROPN NUM CCONJ AUX VERB ADP DET NOUN ADP PROPN PROPN PROPN PROPN PROPN , PRON AUX VERB ADP PROPN PROPN .