Hal Koerner (born January 23, 1976 in Morgantown, WV) is an American distance runner specializing in ultramarathon running. He is the owner of a specialty running store, Rogue Valley Runners, located in the mountainous Southern Oregon town of Ashland. He is one of the subjects of JB Benna's feature-length documentary "Unbreakable: The Western States 100".
Can we infer the following?
Hal Koerner has green hair.
It's impossible to say