Observation is related to Watch. Film is a type of Watch. Film is related to Photograph. 
Candidate is related to Running. Running is related to Captain. Captain is related to White. White is related to Cell. 
Observation <--RelatedTo--> Watch <--IsA-- Film <--RelatedTo--> Photograph 
Candidate <--RelatedTo--> Running <--RelatedTo--> Captain <--RelatedTo--> White <--RelatedTo--> Cell 