Investigation is related to Evaluation. Evaluation is related to Test. Test is related to Education. 
Transport is related to Item. Item is related to Egg. Egg is related to Incredible. 
Investigation <--RelatedTo--> Evaluation <--RelatedTo--> Test <--RelatedTo--> Education 
Transport <--RelatedTo--> Item <--RelatedTo--> Egg <--RelatedTo--> Incredible 