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:
Institute_of_technology

Context:
In Croatia there are many polytechnic institutes and colleges that offer a polytechnic education. The law about polytechnic education in Croatia was passed in 1997.

Question:
What year did Croatia pass a law regarding polytechnic education?

1997