With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Aluminium salts are not useful in metabolic systems.
text_B: Adrian Philip `` Tim '' Goldsmith , -LRB- 25 April 1921 -- 25 March 1961 -RRB- was an Australian flying ace of the Second World War .. Second World War. Second World War. flying ace. flying ace. Officially credited with shooting down 16 1 / 4 enemy aircraft while serving with the Royal Australian Air Force , Goldsmith scored 12 1 / 4 of his victories during the Siege of Malta .. Royal Australian Air Force. Royal Australian Air Force. Siege of Malta. Siege of Malta ( World War II ). His final four victories were achieved against Japanese aircraft while conducting operations over the South West Pacific .. South West Pacific. South West Pacific theatre of World War II
not_related.