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:
Private_school

Context:
Private schools in Australia may be favoured for many reasons: prestige and the social status of the 'old school tie'; better quality physical infrastructure and more facilities (e.g. playing fields, swimming pools, etc.), higher-paid teachers; and/or the belief that private schools offer a higher quality of education. Some schools offer the removal of the purported distractions of co-education; the presence of boarding facilities; or stricter discipline based on their power of expulsion, a tool not readily available to government schools. Student uniforms for Australian private schools are generally stricter and more formal than in government schools - for example, a compulsory blazer. Private schools in Australia are always more expensive than their public counterparts.[citation needed]

Question:
What is an example of an article of uniform clothing typically present in Australian private schools?

blazer