19972
Microcystins ( MCs ) cause normocytic anemia in patients in a hemodialysis unit in Caruaru , Brazil in 1996 , but the underlying mechanisms are still unclear .
 Chemical: Microcystins
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: Microcystins