Line is related to Coast. Coast is related to Soar. Soar is related to Sky. you are likely to find Pollution in/at/on Sky. 
Cruel is related to Bad. Bad is a synonym of Big. Big is related to Room. 
Line <--RelatedTo--> Coast <--RelatedTo--> Soar <--RelatedTo--> Sky <--AtLocation-- Pollution 
Cruel <--RelatedTo--> Bad <--Synonym--> Big <--RelatedTo--> Room 