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: In this report , we describe a case of ciprofloxacin - induced interstitial nephritis and autoimmune hemolytic anemia .
### Output Text:
In this report , we describe a case of <span class="chemical">ciprofloxacin</span> - induced interstitial nephritis and autoimmune hemolytic anemia . 