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:
Victoria_and_Albert_Museum

Context:
One of the more unusual collections is that of Eadweard Muybridge's photographs of Animal Locomotion of 1887, this consists of 781 plates. These sequences of photographs taken a fraction of a second apart capture images of different animals and humans performimg various actions. There are several of John Thomson's 1876-7 images of Street Life in London in the collection. The museum also holds James Lafayette's society portraits, a collection of more than 600 photographs dating from the late 19th to early 20th centuries and portraying a wide range of society figures of the period, including bishops, generals, society ladies, Indian maharajas, Ethiopian rulers and other foreign leaders, actresses, people posing in their motor cars and a sequence of photographs recording the guests at the famous fancy-dress ball held at Devonshire House in 1897 to celebrate Queen Victoria's diamond jubilee.

Question:
How many photographic plates comprise the Animal Locomotion collection?

781