11159
The Q - CHEM implementation interfaces EFP with standard quantum mechanical ( QM ) methods such as Hartree - Fock , density functional theory , perturbation theory , and coupled - cluster methods , as well as with methods for electronically excited and open - shell species , for example , configuration interaction , time - dependent density functional theory , and equation - of - motion coupled - cluster models .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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