Produce is related to Make. Make is related to Milk. Milk is related to Cold. Cold is related to Could. 
Extension is related to Stretch. Stretch is related to Force. 
Produce <--RelatedTo--> Make <--RelatedTo--> Milk <--RelatedTo--> Cold <--RelatedTo--> Could 
Extension <--RelatedTo--> Stretch <--RelatedTo--> Force 