question: What transit systems does Sun Link connect to ?
answer: the University of Arizona 's CatTran shuttles , Amtrak , and Greyhound intercity bus service
turker_answer: Sun Link connects to the University of Arizona 's CatTran shuttles , Amtrak , and Greyhound intercity bus service .
rule-based: Sun Link connects to the University of Arizona 's CatTran shuttles , Amtrak , and Greyhound intercity bus service .