Question: On what date did the tragedy that resulted in an estimated 80 deaths, and lead to Nicholas Paget-Brown stepping down as leaderof the Kensington and Chelsea London Borough Council occur?
Sentence (from "Grenfell Tower fire"): The Grenfell Tower fire occurred on 14 June 2017 at the 24-storey Grenfell Tower block of public housing flats in North Kensington, Royal Borough of Kensington and Chelsea, West London.
Relevant evidence: Yes