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: A case of necrotizing myopathy due to a short epsilon - aminocaproic acid ( EACA ) treatment in a 72 year - old patient with subarachnoid haemorrhage ( SAH ) is described .
### Output Text:
A case of necrotizing myopathy due to a short <span class="chemical">epsilon - aminocaproic acid</span> ( <span class="chemical">EACA</span> ) treatment in a 72 year - old patient with subarachnoid haemorrhage ( SAH ) is described . 