1563
Prominent outbreaks in cattle have occurred in Australia ( 1987 ) , the United States ( 1996 ) , South Africa ( 1996 - 1997 ) , and Brazil ( 1999 ) and , as opposed to human cases , they do not appear to be bound by economic development .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None