Question: What year were the Magyars and Pechenges drug into the war?

Is "In around 890, Oleg waged an indecisive war in the lands of the lower Dniester and Dnieper rivers with the Tivertsi and the Ulichs, who were likely acting as vassals of the Magyars, blocking Rus' access to the Black Sea." the correct answer?
pick from the following.
- yes.
- no.
no