Task: Text Simplification
Input (English): backstory the general plot of the game is that a team of four , an alien , a human , an android , and a psionic , have left earth aboard a spacecraft on the basis of the planet 's imminent destruction.
Output (English): backstory : the general plot of the game is that a team of four - an alien , a human , an android , and a psionic - have left earth aboard a spacecraft because the planet 's destruction is imminent.