Half is a type of Part. Part is related to Department. Department is related to Produce. Working can cause/lead to Produce. 
Refer is related to Regard. Regard is related to Thought. Thought is related to Cognitive. 
Half --IsA--> Part <--RelatedTo--> Department <--RelatedTo--> Produce <--Causes-- Working 
Refer <--RelatedTo--> Regard <--RelatedTo--> Thought <--RelatedTo--> Cognitive 