You will be given a definition of a task first, then some input of the task.
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'.

Context: It was fought during the first year of the Third Macedonian War (171-168 BC). The Macedonians were led by their king, Perseus of Macedon, Link Information: In 179 BC Philip V of Macedon died and Perseus took the throne. Question: How long had he been king when Perseud led the Macedonians in the Third Macedonian War?
Output:
Answer: 8