As of July 2017, the Ark Encounter company has not released how it is doing financially. Mr Ham who owns and operates the company has declined to provide attendance records or how much has been made. There are numerous news articles stating declining visitors and that the Ark Encounter is failing.
No improvement to this sentence is necessary. It makes perfect sense on its own and sounds right. "Either" always takes an "or" else the word wouldn't make sense, as it's meant to contrast binary options.
eg.
I'm either going to eat food or drink water.
<span>it means : a call to take part in a contest or competition, especially a duel.
SENTENCE : I challenge friends all of the time.
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