Trading is related to Sale. Sale is related to Price. Price is related to Sign. Sign is related to Meaning. 
Fruit is a synonym of Yield. Yield is a synonym of Earn. 
Trading <--RelatedTo--> Sale <--RelatedTo--> Price <--RelatedTo--> Sign <--RelatedTo--> Meaning 
Fruit <--Synonym--> Yield <--Synonym--> Earn 