Complex sentence: Throughout the early and mid- 20th century they continued to be successful, until 1974, when two third-generation family members, Jorge and Juan Born, were kidnapped by the Montoneros guerrilla group and recovered only after the payment of a $60m ransom.
Split into simpler sentences: Throughout the early and mid- 20th century they continued to be successful. In 1974, two third-generation family members, Jorge and Juan Born, were kidnapped by the Montoneros guerrilla group and recovered only after the payment of a $60m ransom.