you are likely to find Pollution in/at/on Ocean. you are likely to find Pollution in/at/on Sky. 
People can be Jewish. People is related to Parade. Parade is a type of Walk. Walk is related to Method. 
Ocean <--AtLocation-- Pollution --AtLocation--> Sky 
Jewish <--HasProperty-- People <--RelatedTo--> Parade --IsA--> Walk <--RelatedTo--> Method 