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 the Netherlands, four former institutes of technology have become universities over the past decades. These are the current three Technical Universities (at Delft, Eindhoven and Enschede), plus the former agricultural institute in Wageningen. A list of all hogescholen in the Netherlands, including some which might be called polytechnics, can be found here.

Question:
How many institutes of technology in the Netherlands have converted into full-fledged universities in the past few decades?

four