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:
Catalan_language

Context:
In Andorra, Catalan has always been the sole official language. Since the promulgation of the 1993 constitution, several Andorranization policies have been enforced, like Catalan medium education.

Question:
What is an Andorran school policy?

Catalan medium education