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: "when was the grenfell tower in london built?" whose answer is 1974.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Grenfell Tower construction date
Useful Output:

Doc 1: The tower was built in the 1970s, but recently renovated. An £8.6m refurbishment - part of a wider transformation of the estate - was completed
Doc 2: It's now five years since 72 people lost their lives in the Grenfell Tower disaster, on 17 June 2017. What has changed?
Doc 3: It was refurbished in 2016 by lead contractor Rydon Maintenance in an £8.6m scheme for the Kensington and Chelsea Tenant Management Organisation
Doc 4: While an exact timeline is not certain, the group said the memorial design could start in 2025 and the build could begin from late 2026,
Doc 5: Peter Apps presents a timeline of the key moments during the fatal refurbishment of the west London tower block.