19974
After the prolonged exposure of MC - LR , significant decreases of red blood cell count ( RBC ) , hemoglobin ( Hb ) and hematocrit ( Ht ) were observed in 2 and 8 mu g / kg bw groups , but erythrocyte mean corpuscular volume ( MCV ) showed no significant changes .
 Chemical: MC - LR
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: MC - LR