122757
They discover a man named Roy ( Zak Orth ) who predicted it and other similar events , and Walter realizes Roy has connections to a past experiment he did over twenty years ago , called the " Ghost Network " .
 Zak Orth
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Zak Orth