The term past progressive tense is identified in base64 scheme by the sequence cGFzdCBwcm9ncmVzc2l2ZSB0ZW5zZQ==, while the MD5 signature is equal to db13ac6076d8cb303dfe7de6a07f736a. The ASCII encoding of past progressive tense in hexadecimal notation is 706173742070726f67726573736976652074656e7365.