Complex sentence: Vendel era helmet plates (from the 6th or 7th century) depict a helmeted, spear and shield-holding figure riding a horse, flanked by two birds that has been interpreted as Odin accompanied by birds; his ravens.
Split into simpler sentences: Vendel era helmet plates (from the 6th or 7th century) depict a helmeted figure holding a spear and a shield while riding a horse, flanked by two birds. The plate has been interpreted as Odin accompanied two by birds; his ravens.