The phrase you provided appears to be Polish: “ile dzieci mieli dulscy” and translates to “how many children did the Dulscy have.” Answer:

• In the Polish play Moralność pani Dulskiej (The Morality of Mrs. Dulska), the Dulscy family has two children: Zbyszko Dulski (their son) and a daughter (Hesia or Mela, depending on the source). Different sources describe the daughters with slightly different names, but the family is commonly noted as having two children in most adaptations and summaries.

If you’d like, I can look up precise, source-specific details about the exact names of the Dulscy children in a particular production or edition.