Mortgage is related to Bank. Bank is related to Residence. Residence is related to Camp. Camp is related to Go. 
Affair is related to Secret. Secret is related to Word. 
Mortgage <--RelatedTo--> Bank <--RelatedTo--> Residence <--RelatedTo--> Camp <--RelatedTo--> Go 
Affair <--RelatedTo--> Secret <--RelatedTo--> Word 