162 . Fighter Escadrille was a unit of the odz Army at the start of the Second World War . The unit was attached to the Polish Air Force .
At the beginning of the Second World War , the Fighter Escadrille was a unit of the odz army , which was attached to the Polish Air Force .

Select your answer from the options. Do these sentences mean the same thing?
Available choices:
[a]. no;
[b]. yes;
[b].