You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "The 2008–09 Copa del Rey final was held at a football stadium which as a seating capacity of what?" whose answer is 49,500.
Each document should contain about 30 words, and these documents should contain useful information.

Query: seating capacity Mestalla stadium
Useful Output:

Doc 1: Mestalla Stadium has a capacity of 49,430 seats, while Peter Mokaba Stadium holds 46,000 seats. Follow us @sportsrender ✓ #football #stadium
Doc 2: With additional seating added to other areas of the stadium, the capacity remained at 50,000, but with 33,053 seats. This gave the fans
Doc 3: Spain. Home of @valenciacf Capacity: 49.430 The stadium is the home of Valencia  seating capacity of 60000 spectators. It was
Doc 4: Originally starting out to hold a capacity of 17,000, it has evolved and can now hold over 55,000 spectators. This makes it the 7th largest
Doc 5: "Estadio de Mestalla", Valencia ( Spain ). 🏟️ @valenciacf. Capacity : 48 600 @one_day_one_stadium · #valencia#valenciacf#mestalla#spain#