Grass is related to Cow. Cow is related to Steer. 
Rush is related to Hour. Hour is related to Chunk. Chunk is related to Year. Year is related to Day. 
Grass <--RelatedTo--> Cow <--RelatedTo--> Steer 
Rush <--RelatedTo--> Hour <--RelatedTo--> Chunk <--RelatedTo--> Year <--RelatedTo--> Day 