Question: What is the name of the four-wheel drive system featured in the Jeep Patriot which was one of Jeep's first crossover SUVs in 2007? 
Sentence (from "Jeep Liberty (KJ)"): Introduced in May 2001 for the 2002 model year as a replacement for the Cherokee (XJ), the Liberty was priced between the Wrangler and Grand Cherokee.
Relevant evidence: No