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:
London

Context:
Islington's 1 mile (1.6 km) long Upper Street, extending northwards from Angel, has more bars and restaurants than any other street in the United Kingdom. Europe's busiest shopping area is Oxford Street, a shopping street nearly 1 mile (1.6 km) long, making it the longest shopping street in the United Kingdom. Oxford Street is home to vast numbers of retailers and department stores, including the world-famous Selfridges flagship store. Knightsbridge, home to the equally renowned Harrods department store, lies to the south-west.

Question:
What famous high-end department store is located on Oxford Street?

Selfridges flagship store