Given a text, write a compressed version of it in a single sentence.

Example Input: A preliminary type, form, or instance of a system thatPrototype serves as a model for later stages or for the final, complete version of the system.
Example Output: An earlier type, form, or instance of a system Prototype functions as a model for the final system's version

Example Input: It would be the highest-level contact between the United States and North Korea since President Bush took office.
Example Output: It would be the highest-level contact b/t the US and North Korea since Bush began.

Example Input: While there is plenty to see within the Kathmandu Valley, beyond the valley lies a different, more natural, and less polluted Nepal.
Example Output:
While there is plenty to see within the Kathmandu Valley more natural than Nepal.