Task: Sentence Expansion
Input (English): Their name has two parts : " endo- " and " -orphin " ; these are short forms of the words " endogenous " and " morphine " .
Output (English): It consists of two parts : " endo- " and " -orphin " ; these are short forms of the words " endogenous " and " morphine " , intended to mean " a morphine-like substance originating from within the body " .