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: CONCLUSIONS : Despite a high prevalence of psychiatric disturbance , outcomes for patients transplanted emergently for acetaminophen - induced ALF were comparable to those transplanted for non - acetaminophen - induced ALF and electively for CLD .
### Output Text:
CONCLUSIONS : Despite a high prevalence of psychiatric disturbance , outcomes for patients transplanted emergently for <span class="chemical">acetaminophen</span> - induced ALF were comparable to those transplanted for non - <span class="chemical">acetaminophen</span> - induced ALF and electively for CLD . 