Participant is related to Person. Survivor is a type of Person. Survivor is related to Widow. Widow is related to Black. 
Waste is related to Time. Time is related to Function. Function is related to Math. 
Participant <--RelatedTo--> Person <--IsA-- Survivor <--RelatedTo--> Widow <--RelatedTo--> Black 
Waste <--RelatedTo--> Time <--RelatedTo--> Function <--RelatedTo--> Math 