Aluminum is a type of Material. Mineral is a type of Material. 
Skill is related to Knowledge. you are likely to find Knowledge in/at/on Head. Head is related to Fog. Fog is related to Cold. 
Aluminum --IsA--> Material <--IsA-- Mineral 
Skill <--RelatedTo--> Knowledge --AtLocation--> Head <--RelatedTo--> Fog <--RelatedTo--> Cold 