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They were very important in computational chemistry from the 60 s to the 90 s , especially for treating large molecules where the full Hartree–Fock method without the approximations were too costly .
 person: Hartree–Fock
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Hartree–Fock 
Answer:
 person: Hartree–Fock