<qa>  How many evaluable patients will be enrolled in the safety run-in portion of- Up to 12 evaluable patients will be enrolled in the safety run-in portion of the study. Approximately twenty patients, including 6 from the safety run-in portion of the study, will be evaluated in the phase 2 portion of the study. The accrual ceiling will be set at 55 to accommodate screen failures a 50 failure rate with regard to mesothelin expression and inevaluable subjects. 