6874
Her work in complexity theory includes the classification of approximation problems , showing that some problems in NP remain hard even when only an approximate solution is needed , and pioneering methods for delegating computations to untrusted servers .
 None
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:
 None