The term background knowledge is identified in base64 scheme by the sequence YmFja2dyb3VuZCBrbm93bGVkZ2U=, while the MD5 signature is equal to d87d22f534eab4e902b47b1874260445. The ASCII encoding of background knowledge in hexadecimal notation is 6261636b67726f756e64206b6e6f776c65646765.