This is the 1924th most frequent Dutch word.
who
The Dutch word "who" does not exist; you might be referring to "hoe," which means "how" in English.
In this sentence, 'wie' is used as an interrogative pronoun to ask a question about the identity of a person responsible for something.
Wie is verantwoordelijk voor deze situatie?
Who is responsible for this situation?
Here, 'wie' functions as a relative pronoun, introducing a clause that provides additional information regarding the subject, the winner.
Ik weet wie de winnaar is.
I know who the winner is.
In this sentence, 'wie' is used in a restrictive relative clause, specifying the identity of the person referred to as 'degene'.