Unexpected is derived from Expect. Unexpected is the opposite of Natural. Natural is related to Herb. Herb is related to Alternative. 
Touch is a type of Perceive. Touch is a type of Change. Rise is a type of Change. Rise is related to Roman. 
Expect <--DerivedFrom-- Unexpected <--Antonym--> Natural <--RelatedTo--> Herb <--RelatedTo--> Alternative 
Perceive <--IsA-- Touch --IsA--> Change <--IsA-- Rise <--RelatedTo--> Roman 