Question: Terlingua Creek is a stream in the U.S. state of Texas, it is a tributary of which one of the principal rivers in the southwest United States and northern Mexico (the other being the Colorado River), and begins in south-central Colorado in the United States and flows to the Gulf of Mexico?
Sentence (from "Walnut Creek (Central Texas)"): Walnut Creek's watershed, spanning 36000 acre , is the largest in Central Austin.
Relevant evidence: No