Heavy is related to Carry. Carry is a type of Sustain. Sustain is a synonym of Confirm. 
Agent is related to Bad. Bad is the opposite of Quality. Quality is a synonym of Choice. Choice is related to Liberty. 
Heavy <--RelatedTo--> Carry --IsA--> Sustain <--Synonym--> Confirm 
Agent <--RelatedTo--> Bad <--Antonym--> Quality <--Synonym--> Choice <--RelatedTo--> Liberty 