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you ' ll recall december of 1988 1988 - - 1998 , i should say , the mars polar lander had a very unsuccessful conclusion to its flight to the red planet .
 you, i, the mars polar lander, its, the red planet
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 you, i, the mars polar lander, its, the red planet