“يَعْلَمُ” (yaʿlamu)means “They know” in this verse. It is a verb. an action or state word. Here it is imperfect verb, third person — masculine — plural.Corpus grammarV — third person masculine plural imperfect verb.
“ونَ” (wna)an attached pronoun meaning “they” or “them.”Corpus grammarPRON — third person masculine plural subject pronoun.