Birthday is related to Eat. Live requires Eat. Live is related to Head. Head is related to Stroke. 
Pale is a synonym of White. White is related to Sugar. 
Birthday <--RelatedTo--> Eat <--HasPrerequisite-- Live <--RelatedTo--> Head <--RelatedTo--> Stroke 
Pale <--Synonym--> White <--RelatedTo--> Sugar 