You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Portugal

Context:
Portuguese law applied in the former colonies and territories and continues to be the major influence for those countries. Portugal's main police organizations are the Guarda Nacional Republicana – GNR (National Republican Guard), a gendarmerie; the Polícia de Segurança Pública – PSP (Public Security Police), a civilian police force who work in urban areas; and the Polícia Judiciária – PJ (Judicial Police), a highly specialized criminal investigation police that is overseen by the Public Ministry.

Question:
What is the Policia de Seguranca Publica - PSP (Public Security Police)?

a civilian police force who work in urban areas