Complex sentence: In 1976, the Spanish engineer, Francisco Pavía Alemany, started a mathematical study of this archaeological monument, the first results were published in 1986 by the Instituto of Arqueologia Brasileira (Pavía Alemany F.1986).
Split into simpler sentences: In 1976, the Spanish engineer Francisco Pavía Alemany started a mathematical study of this archaeological monument. The first results were published in 1986 by the Instituto of Arqueologia Brasileira (Pavía Alemany F.1986).