Cancer is a type of Illness. Infection is a type of Illness. Infection is a synonym of Transmission. 
Cow is related to Animal. you are likely to find Heart in/at/on Animal. you are likely to find Heart in/at/on Turkey. Turkey is a synonym of Bomb. 
Cancer --IsA--> Illness <--IsA-- Infection <--Synonym--> Transmission 
Cow <--RelatedTo--> Animal <--AtLocation-- Heart --AtLocation--> Turkey <--Synonym--> Bomb 