198977
A useful vector notation expresses the acceleration normal to the instantaneous line of sight : where \ Omega is the rotation vector of the line of sight : where \ vec V_r is the closing velocity from missile to the target and \ vec R is the range from missile to target .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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