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 fluoxetine treatment , there was a significant 47 % improvement ( p < 0 . 05 ) of apomorphine - induced dyskinesias without modification of parkinsonian motor disability .
### Output Text:
After <span class="chemical">fluoxetine</span> treatment , there was a significant 47 % improvement ( p < 0 . 05 ) of <span class="chemical">apomorphine</span> - induced dyskinesias without modification of parkinsonian motor disability . 