Policeman is related to Duty. Duty is related to Armed. Armed is related to War. Combat is part of War. 
Hypothesis is related to Essay. Essay is a type of Paper. Paper is related to Burn. Burn is related to Like. 
Policeman <--RelatedTo--> Duty <--RelatedTo--> Armed <--RelatedTo--> War <--PartOf-- Combat 
Hypothesis <--RelatedTo--> Essay --IsA--> Paper <--RelatedTo--> Burn <--RelatedTo--> Like 