Baby is related to Day. Day is related to Weather. Weather is related to Sunlight. 
Modern is related to Era. Era is related to Century. Century is related to Guard. Guard is related to Building. 
Baby <--RelatedTo--> Day <--RelatedTo--> Weather <--RelatedTo--> Sunlight 
Modern <--RelatedTo--> Era <--RelatedTo--> Century <--RelatedTo--> Guard <--RelatedTo--> Building 