you are likely to find Water in/at/on Flood. Water is related to Basement. Basement is related to Lower. Lower is a synonym of Diminish. 
you are likely to find Fog in/at/on Sea. 
Flood <--AtLocation-- Water <--RelatedTo--> Basement <--RelatedTo--> Lower <--Synonym--> Diminish 
Sea <--AtLocation-- Fog 