In the sentence extracted from biomedical literature, identify all the chemical entities. The required answer format is the same sentence with HTML <span> tags to mark up specific entities. 
### Entity Markup Guides:
Use <span class="chemical"> to denote a chemical.

### Input Text: RESULTS : Intraocular inflammation was present in 54 . 5 , 9 . 9 , 11 . 1 , and 0 % of patients at baseline , 6 months , 1 year , 2 years , 3 years , and beyond 3 years after receiving the implant , respectively .
### Output Text:
RESULTS : Intraocular inflammation was present in 54 . 5 , 9 . 9 , 11 . 1 , and 0 % of patients at baseline , 6 months , 1 year , 2 years , 3 years , and beyond 3 years after receiving the implant , respectively . 