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: RESULTS : Of 29 patients who received lidocaine in the setting of cocaine - associated MI , no patient died ; exhibited bradydysrhythmias , ventricular tachycardia , or ventricular fibrillation ; or experienced seizures after administration of lidocaine ( 95 % confidence interval , 0 % to 11 % ) .
### Output Text:
RESULTS : Of 29 patients who received <span class="chemical">lidocaine</span> in the setting of <span class="chemical">cocaine</span> - associated MI , no patient died ; exhibited bradydysrhythmias , ventricular tachycardia , or ventricular fibrillation ; or experienced seizures after administration of <span class="chemical">lidocaine</span> ( 95 % confidence interval , 0 % to 11 % ) . 