Pig is related to Girl. Girl is related to Hair. Hair is related to Dog. Dog is related to Animal. 
State is related to Danger. Pollution is a type of Danger. you are likely to find Pollution in/at/on Lawn. 
Pig <--RelatedTo--> Girl <--RelatedTo--> Hair <--RelatedTo--> Dog <--RelatedTo--> Animal 
State <--RelatedTo--> Danger <--IsA-- Pollution --AtLocation--> Lawn 