3240
Before nitroprusside infusion , 5 cm H2O CPAP significantly , P less than . 05 , decreased arterial blood pressure , but did not significantly alter heart rate , cardiac output , systemic vascular resistance , or QS / QT .
 Chemical: nitroprusside; Chemical: H2O
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: nitroprusside, H2O 
Answer:
 Chemical: nitroprusside; Chemical: H2O