Two kids wearing white robes are practicing martial arts ; boy on the left has blond-hair and is blocking a punch thrown by the dark-haired boy on the right .
We believe that the two boys practicing martial arts are being watched by others .
We believe that the two boys practicing martial arts are being watched by others .
It is impossible that the two boys practicing martial arts are being watched by others .
The two boys practicing martial arts are being watched by others .