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: There was no significant difference between groups in terms of total climbing time in the apomorphine - induced climbing test ( p > 0 . 05 ) .
### Output Text:
There was no significant difference between groups in terms of total climbing time in the <span class="chemical">apomorphine</span> - induced climbing test ( p > 0 . 05 ) . 