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: The authors reviewed reported cases of antibiotic - induced manic episodes by means of a MEDLINE and PsychLit search for reports of antibiotic - induced mania .
### Output Text:
The authors reviewed reported cases of antibiotic - induced manic episodes by means of a MEDLINE and PsychLit search for reports of antibiotic - induced mania . 