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Reuniting with two other survivors Pvt. O'Leary ( Tim Pocock ) and Cpl. Richard Jennings ( Martin Copping ) , they must fight to find a way back to the British lines before the German army and an impending artillery attack wipe them out .
 Tim Pocock, Martin Copping
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tim Pocock, Martin Copping