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: "Which is a taller mountain, K2 or Gasherbrum III?" whose answer is K2.
Each document should contain about 30 words, and these documents should contain useful information.

Query: elevation of K2
Useful Output:

Doc 1: K2 is the second-highest mountain in the world, at 8,611 metres (28,251 ft) tall. It is also known as Mount Godwin-Austen or Chogori (ཆོགོ་རི།).
Doc 2: K2, the world's second-tallest mountain, stands at an impressive 8,611m. Nestled at the foot of this iconic mountain, K2 Base Camp sits at 5,400
Doc 3: Scaling New Heights: The Challenge of Climbing K2, the Second-Highest Peak in the World. K2 Elevation from sea level 28'251 ft. (8611 m.)
Doc 4: K2, also known as Mount Godwin-Austen or Chhogori, is the second-highest mountain peak in the world, with an elevation of 8,611 meters (28,251
Doc 5: K2, the world's second highest peak (28,251 feet [8,611 metres]), second only to Mount Everest. K2 is located in the Karakoram Range and