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It was founded in 1868 as the Newark German Hospital , and was renamed in 1952 in honor of Clara Maass , a former nurse who trained there at the hospital 's Christina Trefz Training School for Nurses , and become the hospital 's head nurse .
 person: Clara Maass
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: Clara Maass