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: Cerebral haemorrhage was the 11th most frequent cause of death , accounting for only 0 . 8 % of deaths among the patients , whereas it was the 5th most common cause of death among the Japanese general population in 1985 .
### Output Text:
Cerebral haemorrhage was the 11th most frequent cause of death , accounting for only 0 . 8 % of deaths among the patients , whereas it was the 5th most common cause of death among the Japanese general population in 1985 . 