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:
The_Times

Context:
On 26 July 2012, to coincide with the official start of the London 2012 Olympics and the issuing of a series of souvenir front covers, The Times added the suffix "of London" to its masthead.

Question:
What kind of front cover did The Times issue on 26 July 2012?

souvenir