Identify the capitalized part of the sentence.

The main event WILL be a memory contest.

subject,
predicate,
direct object,
indirect object,
predicate noun,
predicate adjective,

thanks for your help I guess I will mark it as a predicate.

the answer is predicate.

I don't think the answer is there.

The word "will" is an auxiliary (helping) verb that makes up part of the simple predicate: "will be."

That's the closest, yes.

In this sentence, the capitalized part is "WILL."

To identify the capitalized part, you need to look for words that are written in all capital letters. In this case, "WILL" stands out as the capitalized part of the sentence.