Instructions: In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Input: Context: The initial versions of Xak: The Art of Visual Stage were released for NEC's PC-8801 and PC-9801 systems in June 1989 Link Information: The , commonly shortened to PC-88, are a brand of Zilog Z80-based 8-bit home computers released by Nippon Electric Company (NEC) in 1981 Question: How many years after the release of the PC-8801 was the PC-9801 released?
Output:
Answer: 1