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: ACE inhibitor and angiotensin - releasing blocker ( ARB ) therapy reduced proteinuria development .
### Output Text:
<span class="chemical">ACE inhibitor</span> and <span class="chemical">angiotensin - releasing blocker</span> ( <span class="chemical">ARB</span> ) therapy reduced proteinuria development . 