With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Aluminium is prevalent in the environment.
text_B: Aluminium or aluminum -LRB- see below -RRB- is a chemical element in the boron group with symbol Al and atomic number 13 .. below. Aluminium#Different endings. chemical element. chemical element. boron group. boron group. atomic number. atomic number. It is a silvery-white , soft , nonmagnetic , ductile metal .. ductile. ductility. metal. metal. By mass , aluminium makes up about 8 % of the Earth 's crust ; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust , though it is less common in the mantle below .. below. Aluminium#Different endings. metal. metal. oxygen. oxygen. silicon. silicon. Aluminium metal is so chemically reactive that native specimens are rare and limited to extreme reducing environments .. metal. metal. native specimens. Native metal. reducing. Redox. Instead , it is found combined in over 270 different minerals .. The chief ore of aluminium is bauxite .. ore. ore. bauxite. bauxite. Aluminium is remarkable for the metal 's low density and its ability to resist corrosion through the phenomenon of passivation .. metal. metal. density. density. corrosion. corrosion. passivation. passivation ( chemistry ). Aluminium and its alloys are vital to the aerospace industry and important in transportation and structures , such as building facades and window frames .. alloys. aluminium alloy. aerospace. aerospace. The oxides and sulfates are the most useful compounds of aluminium .. oxides. oxides. sulfates. sulfates. Despite its prevalence in the environment , no known form of life uses aluminium salts metabolically , but aluminium is well tolerated by plants and animals .. salts. Salt ( chemistry ). metabolically. metabolically. Because of these salts ' abundance , the potential for a biological role for them is of continuing interest , and studies continue .. salts. Salt ( chemistry )
related.