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 remaining patient in the series developed fulminant hepatitis when the drug was accidentally recommenced 1 year after a prior episode of methyldopa - induced hepatitis .
### Output Text:
The remaining patient in the series developed fulminant hepatitis when the drug was accidentally recommenced 1 year after a prior episode of <span class="chemical">methyldopa</span> - induced hepatitis . 