The term semicircular arch is identified in base64 scheme by the sequence c2VtaWNpcmN1bGFyIGFyY2g=, while the MD5 signature is equal to 472231ffbfba9ba88604e0e372dcba5c. The ASCII encoding of semicircular arch in hexadecimal notation is 73656d6963697263756c61722061726368.