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: We also show that a processed pseudogene of the acidic ribosomal phosphoprotein P1 ( ARPP1 ) is inserted directly upstream of pseudo - BRCA1 exon 1A .
### Output Text:
We also show that a processed pseudogene of the acidic ribosomal phosphoprotein P1 ( ARPP1 ) is inserted directly upstream of pseudo - BRCA1 exon 1A . 