Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Shuttle: The Space Flight Simulator (PC - 5.25" Disk) (NOT CD-Rom)
Product description: Virgin Games' Shuttle simulator was a DOS program designed to simulate piloting the NASA Space Shuttle. It was praised as being quite accurate to actually piloting the shuttle. The game is noted for true 3D simulations of the space shuttle in many situations, from leaving the Vehicle Assembly Building to returning to Earth at the Shuttle Landing Facility, but more importantly it simulated every switch, knob and display on the shuttle control panels.
Product feature: For DOS (Windows 95 / 98), 5.25" Floppy Disk, Realistic Shuttle Space Flight Simulator, NOT CD
Product brand: by Virgin
Target attributes: ESRB Rating
Answer: attribute: esrb rating
value: None
source: None