Delivery is a type of Birth. Birth is the opposite of Murder. Fire can Murder. Trigger entails/necessarily involves Fire. 
Traveler is a type of Person. Person wants (to) Software. Tomato is a type of Software. Tomato is related to Stem. 
Delivery --IsA--> Birth <--Antonym--> Murder <--CapableOf-- Fire <--Entails-- Trigger 
Traveler --IsA--> Person --Desires--> Software <--IsA-- Tomato <--RelatedTo--> Stem 