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 concentration for adrenaline - induced arrhythmia was significantly higher than those for the other types of arrhythmias .
### Output Text:
The concentration for <span class="chemical">adrenaline</span> - induced arrhythmia was significantly higher than those for the other types of arrhythmias . 