In April 2001 , the shoes were replaced by Pierre Balmain -designed safety shoes , in light of safety reviews after the Singapore Airlines Flight 006 crash where flight attendants complained of missing sandals .
ADP PROPN NUM , DET NOUN AUX VERB ADP PROPN PROPN VERB NOUN NOUN , ADP NOUN ADP NOUN NOUN ADP DET PROPN PROPN PROPN NUM NOUN ADV NOUN NOUN VERB ADP VERB NOUN .