Half is related to Skirt. Skirt is related to Length. 
Time is related to Calendar. you are likely to find Calendar in/at/on Wall. Wall can be used for Separation. Separation is related to Door. 
Half <--RelatedTo--> Skirt <--RelatedTo--> Length 
Time <--RelatedTo--> Calendar --AtLocation--> Wall --UsedFor--> Separation <--RelatedTo--> Door 