2691
Histamine release occurred in most patients , the highest level 2 minutes after d - tubocurarine dosing .
 Chemical: Histamine; Chemical: d - tubocurarine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Histamine; Chemical: d - tubocurarine