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 MAP , increases were identified in both cardiac output ( from 1 . 54 + / - 0 . 57 to 1 . 65 + / - 0 . 57 1 / min ) and Emax ( from 1 . 86 + / - 0 . 9 to 2 . 41 + / - 1 . 31 mmHg / ml ) .
### Output Text:
After MAP , increases were identified in both cardiac output ( from 1 . 54 + / - 0 . 57 to 1 . 65 + / - 0 . 57 1 / min ) and Emax ( from 1 . 86 + / - 0 . 9 to 2 . 41 + / - 1 . 31 mmHg / ml ) . 