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: A Case of Sudden Cardiac Death due to Pilsicainide - Induced Torsades de Pointes .
### Output Text:
A Case of Sudden Cardiac Death due to <span class="chemical">Pilsicainide</span> - Induced Torsades de Pointes . 