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: We report the clinical and bioptic findings for a 57 - year - old woman with severe chloroquine - induced myopathy .
### Output Text:
We report the clinical and bioptic findings for a 57 - year - old woman with severe <span class="chemical">chloroquine</span> - induced myopathy . 