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 Flumazenil in Intravenous Conscious Sedation with Diazepam Multicenter Study Group II .
### Output Text:
The <span class="chemical">Flumazenil</span> in Intravenous Conscious Sedation with <span class="chemical">Diazepam</span> Multicenter Study Group II . 