Q: This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.
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.
A:
What year did Croatia pass a law regarding polytechnic education?