Complex sentence: In 1995, Wiel Arets became the Dean, drastically restructuring the school to a research based institute, and was succeeded by Spanish architect Alejandro Zaera-Polo in 2002.
Split into simpler sentences: In 1995, Wiel Arets became the dean, drastically restructuring the school to a research based institute. Arets stepped down in 2002, and was succeeded by Spanish architect Alejandro Zaera-Polo in 2002.