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where Δ " p " is the uncertainty in the particle 's momentum and Δ " x " is the uncertainty in position ( and " ħ " is the reduced Planck constant ) .
 person: Planck
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:
 person: Planck