Class is related to Like. Like is related to Manner. Manner is a synonym of Fashion. 
you are likely to find Mouth in/at/on River. River is related to Landscape. Landscape is related to Hill. Hill is related to Gravity. 
Class <--RelatedTo--> Like <--RelatedTo--> Manner <--Synonym--> Fashion 
Mouth --AtLocation--> River <--RelatedTo--> Landscape <--RelatedTo--> Hill <--RelatedTo--> Gravity 