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: We conclude that patients may be restarted on inhaled beclomethasone when clinically indicated ; however , because of the high recurrence rate , patients who develop hoarseness should not be re - challenged .
### Output Text:
We conclude that patients may be restarted on inhaled <span class="chemical">beclomethasone</span> when clinically indicated ; however , because of the high recurrence rate , patients who develop hoarseness should not be re - challenged . 