Complex sentence: The more soft spoken McArthur was Harvard trained in architecture, mathematics, engineering, and music and obtained an architect's license in Arizona, number 338,1925, the year he arrived in Phoenix to begin his practice.
Split into simpler sentences: The more soft spoken McArthur was Harvard trained in architecture, mathematics, engineering, and music. McArthur obtained an architect's license in Arizona, number 338,in 1925, the year he arrived in Phoenix to begin his practice.