Complex sentence: Another Prince of Novgorod, Vsevolod Mstislavich, and troops from Novgorod were at war with Finns during a great famine in 1123, however leaving any further developments open, including the whereabouts of the fight.
Split into simpler sentences: Another Prince of Novgorod, Vsevolod Mstislavich, and troops from Novgorod were at war with Finns during a great famine in 1123. Any further developments of the conflict are left open, including the whereabouts of the fight.