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: CONCLUSIONS : This is the first study to link risperidone - induced hyperprolactinemia and SSRI treatment to lower BMD in children and adolescents .
### Output Text:
CONCLUSIONS : This is the first study to link <span class="chemical">risperidone</span> - induced hyperprolactinemia and SSRI treatment to lower BMD in children and adolescents . 