Complex sentence: She also visited the tribal elders in their leper colony north of Hanga Roa, and collected data on the enigmatic "script" known as "rongo rongo"; van Tilburg credits her with a primary role in assisting preservation of Rapa Nui's indigenous Polynesian culture.
Split into simpler sentences: She also visited the tribal elders in their leper colony north of Hanga Roa, and collected data on the enigmatic "script" known as "rongo rongo". Van Tilburg credits her with a primary role in assisting preservation of Rapa Nui's indigenous Polynesian culture.