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 stereotypies induced by d - amphetamine or apomorphine are not potentiated by TRI .
### Output Text:
The stereotypies induced by <span class="chemical">d - amphetamine</span> or <span class="chemical">apomorphine</span> are not potentiated by <span class="chemical">TRI</span> . 