Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Context : The British Army's 1st Artillery Brigade and Headquarters South West is a formation under Force Troops Command that has control over close support artillery units within the British Army and is the Regional Point of Command (RPoC) for British Army units in the South West Region. 
Answer : British Army
What branch was 1st Artillery Brigade and Headquarters South West part of?

Context : Miss La La at the Cirque Fernando is a painting by Edgar Degas, the French Impressionist artist, now in the collection of the National Gallery in London, England. 
Answer : National Gallery
What is the name of the place where Miss La La at the Cirque Fernando can be found?

Context : The Lathen train collision occurred on 22 September 2006 when a Transrapid magnetic levitation (or ``maglev'') train collided with a maintenance vehicle near Lathen, Germany, killing 23 people. 
Answer : 22 September 2006

The date of Lathen train collision?