Complex sentence: Portuguese explorers established contacts with the land later known as "Liberia" as early as 1461 and named the area "Costa da Pimenta", Pepper Coast, because of the abundance of grains of melegueta pepper.
Split into simpler sentences: Portuguese explorers established contacts with people of the land later known as "Liberia" as early as 1461. They named the area "Costa da Pimenta" (Pepper Coast) because of the abundance of melegueta pepper.