Eumenes II
References
Table:
Regnal titles

Preceded by

Attalus I

King of Pergamon
197–159 BC

Succeeded by

Attalus II

Observing the following table concerning 'Eumenes II' — "References" section, create one factual sentence about the highlighted cells, without adding extra data and provide it inside the JSON object {"answer": "YOUR ANSWER"}.