Part is related to Throat. Throat is related to Eating. Fork can be used for Eating. 
Vote is related to Voter. Voter is related to Elect. Elect is related to Political. Political is related to Ally. 
Part <--RelatedTo--> Throat <--RelatedTo--> Eating <--UsedFor-- Fork 
Vote <--RelatedTo--> Voter <--RelatedTo--> Elect <--RelatedTo--> Political <--RelatedTo--> Ally 