Hang is a type of Be. Be is a type of Take. Take is a synonym of Swallow. 
Activity is related to Science. Science is related to Hypothesis. Hypothesis is a type of Concept. Possibility is a type of Concept. 
Hang --IsA--> Be --IsA--> Take <--Synonym--> Swallow 
Activity <--RelatedTo--> Science <--RelatedTo--> Hypothesis --IsA--> Concept <--IsA-- Possibility 