you are likely to find Refrigerator in/at/on Home. you are likely to find Container in/at/on Refrigerator. Container is related to Cell. Cell is related to Round. 
Scare is related to Emotion. Uncertainty is a type of Emotion. Uncertain is derived from Uncertainty. 
Home <--AtLocation-- Refrigerator <--AtLocation-- Container <--RelatedTo--> Cell <--RelatedTo--> Round 
Scare <--RelatedTo--> Emotion <--IsA-- Uncertainty <--DerivedFrom-- Uncertain 