Depending on whom you ask, medical giant UPMC either employs more than 50,000 people -- or no one at all. On Monday, in one of the first hearings of the city of Pittsburgh's lawsuit to strip UPMC of its tax-exempt charity status, Common Pleas Judge R. Stanton Wettick Jr. opened a hearing on the city's lawsuit against UPMC with that very question. "Does UPMC have any employees?" he asked. "I've been told in discovery they don't." William Pietragallo, one of the attorneys representing UPMC at the hearing, answered. "They do not," he said.