Question: When did the namesake of Pre's Trail, located on the north side of the Willamette River in Eugene, Oregon, United States, popularly referred to as "Track Town USA", is a four-mile-long running and walking trail named after a heralded University of Oregon athlete die?
{'answer': 'May 1975', 'supporting_facts': [["Pre's Trail", 0], ['Steve Prefontaine', 2]]}