Problem is related to Error. Error is a synonym of Stumble. Christian can Stumble. Christian is a synonym of Kind. 
Police is related to Investigation. Investigation is related to Suspect. Suspect is a type of Think. 
Problem <--RelatedTo--> Error <--Synonym--> Stumble <--CapableOf-- Christian <--Synonym--> Kind 
Police <--RelatedTo--> Investigation <--RelatedTo--> Suspect --IsA--> Think 