17719
Sri Lanka is a tropical developing island nation that endures significant economic and medical burden as a result of snakebite envenomation , having not only a high prevalence of envenomations , but also one of the highest incidence rates ( 200 snakebites / 100 , 000 people / year ) of venomous snakebite in the world ( Kasturiratne et al . , 2005 ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None