Drop is related to Let. Let is related to Do. Do is related to Fly. Fly is related to Transportation. 
Photograph is related to Portrait. Portrait is related to Family. Family is related to Generation. Generation is a type of Production. 
Drop <--RelatedTo--> Let <--RelatedTo--> Do <--RelatedTo--> Fly <--RelatedTo--> Transportation 
Photograph <--RelatedTo--> Portrait <--RelatedTo--> Family <--RelatedTo--> Generation --IsA--> Production 