Shade is related to Type. Type is related to Motor. Motor is related to Vehicle. 
Forum is related to Thread. Thread is a different concept from Needle. you are likely to find Needle in/at/on Doctor. 
Shade <--RelatedTo--> Type <--RelatedTo--> Motor <--RelatedTo--> Vehicle 
Forum <--RelatedTo--> Thread <--DistinctFrom--> Needle --AtLocation--> Doctor 