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: However , pilocarpine - induced seizures result in a more widespread neuronal death in both WT and D2R - / - brains in comparison to KA .
### Output Text:
However , <span class="chemical">pilocarpine</span> - induced seizures result in a more widespread neuronal death in both WT and D2R - / - brains in comparison to <span class="chemical">KA</span> . 