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: BACKGROUND AND OBJECTIVES : This report aimed to present a case of lateral antebrachial cutaneous neuropathy ( LACNP ) that occurred after a steroid injection in the lateral epicondyle to treat lateral epicondylitis in a 40 - year - old woman .
### Output Text:
BACKGROUND AND OBJECTIVES : This report aimed to present a case of lateral antebrachial cutaneous neuropathy ( LACNP ) that occurred after a <span class="chemical">steroid</span> injection in the lateral epicondyle to treat lateral epicondylitis in a 40 - year - old woman . 