2944
A histomorphometric analysis showed that ELD monotherapy and ELD + ALN combination therapy had a potent inhibitory effect on bone resorption parameters ( osteoclast surface and eroded surface ) , while maintaining bone formation parameters ( osteoblast surface and osteoid surface ) .
 Chemical: ELD; Chemical: ELD; Chemical: ALN
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: ELD, ELD, ALN 
Answer:
 Chemical: ELD; Chemical: ELD; Chemical: ALN