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" Ghostbusters " is a comedy role-playing game designed by Sandy Petersen , Lynn Willis and Greg Stafford and published by West End Games in 1986 .
 person: Sandy Petersen; person: Lynn Willis; person: Greg Stafford; organization: West End Games
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Sandy Petersen; person: Lynn Willis; person: Greg Stafford; organization: West End Games