Power is related to Gas. you are likely to find Gas in/at/on Space. Space is etymologically related to Speed. 
Envelope is part of Balloon. you are likely to find Bill in/at/on Envelope. Bill is related to President. President is related to Boss. 
Power <--RelatedTo--> Gas --AtLocation--> Space --EtymologicallyRelatedTo--> Speed 
Balloon <--PartOf-- Envelope <--AtLocation-- Bill <--RelatedTo--> President <--RelatedTo--> Boss 