In this task, you will be given sentences in which your task is to recognize the name of the organ of the body. An organ is a collection of tissues that structurally form a functional unit specialized to perform a particular function. Although there might be several correct answers, you need to write one of them.

Example Input:  In vivo model of contrast - induced renal injury was induced in mice with unilateral renal occlusion .
Example Output: renal

Example Input:  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 .
Example Output: cerebral

Example Input:  Overexpression of SLAP - 2 in bone marrow macrophages partially suppressed the CSF - 1 - induced tyrosine phosphorylation and / or expression level of a approximately 80 kDa protein without affecting CSF - 1 - induced global tyrosine phosphorylation , or activation of Akt or Erk1 / 2 .
Example Output:
bone