In the sentence extracted from biomedical literature, identify all the disease entities. The required answer format is the same sentence with HTML <span> tags to mark up specific entities. 
### Entity Markup Guides:
Use <span class="disease"> to denote a disease.

### Input Text: Canavan disease is inherited as an autosomal recessive trait that is caused by the deficiency of aspartoacylase ( ASPA ) .
### Output Text:
<span class="disease">Canavan disease</span> is inherited as an autosomal recessive trait that is caused by the <span class="disease">deficiency of aspartoacylase</span> ( ASPA ) . 