Pose is a type of Position. Position is a type of Occupation. Trade is a type of Occupation. Trade is related to Do. 
Electronics is a type of Physics. Physics is related to Rule. Rule is related to Establishment. 
Pose --IsA--> Position --IsA--> Occupation <--IsA-- Trade <--RelatedTo--> Do 
Electronics --IsA--> Physics <--RelatedTo--> Rule <--RelatedTo--> Establishment 