Bag is related to Sock. Sock is related to Thing. Earth is a type of Thing. Earth is a type of Location. 
Point is related to Appointment. Appointment is related to Schedule. Slot is a type of Schedule. Slot is a synonym of Opening. 
Bag <--RelatedTo--> Sock <--RelatedTo--> Thing <--IsA-- Earth --IsA--> Location 
Point <--RelatedTo--> Appointment <--RelatedTo--> Schedule <--IsA-- Slot <--Synonym--> Opening 