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The series consists of 26 half-hour video programs , along with coordinated books , which explore various topics in chemistry through experiments conducted by Stevens Point emeritus professor Don Showalter the " series demonstrator " and interviews with working chemists , it also includes physics and earth science related components .
 organization: Stevens Point; person: Don Showalter
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:
 organization: Stevens Point; person: Don Showalter