Question: Considering the Porsche 928 and Porsche Cayenne.  Which of the two vehicles was exclusively manufactured before the 21st century?
Sentence (from "Four Cs of 21st century learning"): The Four Cs of 21st century learning, also known as the Four Cs or 4 Cs, are four skills that have been identified by the United States-based Partnership for 21st Century Skills (P21) as the most important skills required for 21st century education: critical thinking, communication, collaboration, and creativity.
Relevant evidence: No