Slope is related to Concept. Concept is related to Number. Number is related to Unit. Unit is related to Household. 
Friend is related to Company. Company is related to Crowd. Crowd is related to Interesting. 
Slope <--RelatedTo--> Concept <--RelatedTo--> Number <--RelatedTo--> Unit <--RelatedTo--> Household 
Friend <--RelatedTo--> Company <--RelatedTo--> Crowd <--RelatedTo--> Interesting 