Date is related to Fruit. Fruit is the opposite of Vegetable. 
Tube is related to Glass. Glass can be Fragile. Fragile is a synonym of Delicate. Delicate is related to Butterfly. 
Date <--RelatedTo--> Fruit <--Antonym--> Vegetable 
Tube <--RelatedTo--> Glass --HasProperty--> Fragile <--Synonym--> Delicate <--RelatedTo--> Butterfly 