thin beryllium is a mean of reaching
spear is not long_thin_object. beryllium_ion is beryllium_atom. ridge is long_thin_object. beryllium is not unalloyed_metal. beryllium_atom is atom. beryllium_ion is not beryllium_atom. spear is long_thin_object. beryllium_bronze is not bronze. beryllium is chemical_element. beryllium is unalloyed_metal.