I want to know the answer to the following question:
Who did Philetaerus declare himself loyal to?
All the background I'm provided with is that "After the death of Lysimachus, one of his officers, Philetaerus, took control of the city of Pergamum in 282 BC along with Lysimachus' war chest of 9,000 talents and declared himself loyal to Seleucus I while remaining de facto independent.". Is that enough to answer the question?
Answer: yes