The chief doorman, Mark Benecke, was under the misapprehension that he was the owner of Cypress Gardens in Queens.)
Mark Benecke, the doorman, thought he was the part owner of Cypress Gardens. 
mnli hypothesis: Mark Benecke, the doorman, thought he was the part owner of Cypress Gardens.  premise: The chief doorman, Mark Benecke, was under the misapprehension that he was the owner of Cypress Gardens in Queens.)