Throat is related to Tube. Stem is a type of Tube. Stem is related to Wood. Wood is related to Table. 
Gallery is a type of Audience. Gallery is related to Section. Section is related to Page. 
Throat <--RelatedTo--> Tube <--IsA-- Stem <--RelatedTo--> Wood <--RelatedTo--> Table 
Audience <--IsA-- Gallery <--RelatedTo--> Section <--RelatedTo--> Page 