you are likely to find Cat in/at/on Lap. you are likely to find Cat in/at/on Ground. Ground is related to Occasional. 
Mentor is a type of Person. Ethnic is a type of Person. Ethnic is related to Race. Race is related to Competitive. 
Lap <--AtLocation-- Cat --AtLocation--> Ground <--RelatedTo--> Occasional 
Mentor --IsA--> Person <--IsA-- Ethnic <--RelatedTo--> Race <--RelatedTo--> Competitive 