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:
Doctor_Who

Context:
The phrase "Hiding behind (or 'watching from behind') the sofa" entered British pop culture, signifying in humour the stereotypical early-series behaviour of children who wanted to avoid seeing frightening parts of a television programme while remaining in the room to watch the remainder of it. The phrase retains this association with Doctor Who, to the point that in 1991 the Museum of the Moving Image in London named their exhibition celebrating the programme "Behind the Sofa". The electronic theme music too was perceived as eerie, novel, and frightening, at the time. A 2012 article placed this childhood juxtaposition of fear and thrill "at the center of many people's relationship with the show", and a 2011 online vote at Digital Spy deemed the series the "scariest TV show of all time".

Question:
What was the name of the 1991 Doctor Who exhibition?

Behind the Sofa