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Starring Tom Wopat , Kal Weber and Mark Ramsey , the film follows a group of scientist s who must deal with a swarm of man-eating ants feeding on the population , but eventually discovered that something was controlling the ants .
 Tom Wopat
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tom Wopat