Cost is related to Quality. Quality is related to Term. Term is related to Grain. Grain is related to Seed. 
Living is related to Work. Work is related to Voluntary. 
Cost <--RelatedTo--> Quality <--RelatedTo--> Term <--RelatedTo--> Grain <--RelatedTo--> Seed 
Living <--RelatedTo--> Work <--RelatedTo--> Voluntary 