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: After recovery from hyperglycaemia , he remained polyuric despite normal blood glucose concentrations ; water deprivation testing indicated nephrogenic diabetes insipidus , likely to be lithium - induced .
### Output Text:
After recovery from hyperglycaemia , he remained polyuric despite normal blood <span class="chemical">glucose</span> concentrations ; water deprivation testing indicated nephrogenic diabetes insipidus , likely to be <span class="chemical">lithium</span> - induced . 