149
The estimated LD50 at 24 h was 3 . 45 g Al / kg body weight ( b . wt . ) .
 Chemical: Al
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: Al 
Answer:
 Chemical: Al