Whose death in Surat An-Nisa' 4/159?

Here is Surat An-Nisa' 4/159: > And there is none from the People of the Scripture but that he will surely believe in Jesus before **his death**. And on the Day of Resurrection he will be against them a witness. source The question is, whose death is this? Is it belong to Jesus(puh), or a person from the People of the Scripture? Generally, what does this verse say? Please, give answers supported by Quran, word meaning (from Arabic), maybe historical background, and then lastly supported by hadith. A mixture would be great! Thanks.