28197
Although chronic arsenic exposure is a well - known risk for cardiovascular disease and has a strong correlation with hypertension , the molecular pathogenesis underlying arsenic exposure - induced hypertension remains poorly understood .
 Chemical: arsenic; Chemical: arsenic
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: arsenic, arsenic 
Answer:
 Chemical: arsenic; Chemical: arsenic