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Intra - operative monitoring of partial pressure of tissue oxygen ( PtiO2 ) is a very sensitive method of detecting the decrease of oxygen for cell utilization , due to decreased blood flow , during temporary clipping and after definitive clipping , in middle cerebral artery incidental unruptured aneurysm surgery .
 Anatomy: tissue; Anatomy: cell; Anatomy: blood; Anatomy: middle cerebral artery; Anatomy: aneurysm
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: tissue; Anatomy: cell; Anatomy: blood; Anatomy: middle cerebral artery; Anatomy: aneurysm