Steam is the opposite of Air. Air is a type of Region. Vacuum is a type of Region. Vacuum is related to Dirt. 
Indicator is related to Mark. Tip is a type of Mark. Tip is related to Bullet. Bullet is related to Single. 
Steam <--Antonym--> Air --IsA--> Region <--IsA-- Vacuum <--RelatedTo--> Dirt 
Indicator <--RelatedTo--> Mark <--IsA-- Tip <--RelatedTo--> Bullet <--RelatedTo--> Single 