Complex sentence: He taught design and visual studies at Yale for 23 years, serving as the William Henry Bishop Visiting Professor, fall 1988, and tenured Associate Professor of Architectural Design from 1991, becoming a full professor in 1995.
Split into simpler sentences: He taught design and visual studies at Yale for 23 years. Ranalli was appointed William Henry Bishop Visiting Professorship of Architectural Design in fall 1988, and promoted to Associate Professor of Architectural Design with tenure in 1991, becoming a full professor in 1995.