Indication is related to Clock. Clock is related to Instrument. Instrument is related to Musician. 
Cake can be used for Celebration. Celebration is related to Birthday. Birthday is related to Annual. 
Indication <--RelatedTo--> Clock <--RelatedTo--> Instrument <--RelatedTo--> Musician 
Cake --UsedFor--> Celebration <--RelatedTo--> Birthday <--RelatedTo--> Annual 