Wear is related to Foot. Foot is related to Ground. you are likely to find Dust in/at/on Ground. 
Acid is a type of Chemical. Chemical is related to Metal. Metal is the opposite of Water. Water is related to Pump. 
Wear <--RelatedTo--> Foot <--RelatedTo--> Ground <--AtLocation-- Dust 
Acid --IsA--> Chemical <--RelatedTo--> Metal <--Antonym--> Water <--RelatedTo--> Pump 