Sex can be Pleasant. Sex can be Nice. Nice is related to View. View is a synonym of Position. 
Estimate is the opposite of Precise. Precise is similar to Dead. Dead is related to Hay. Hay is a synonym of Sack. 
Pleasant <--HasProperty-- Sex --HasProperty--> Nice <--RelatedTo--> View <--Synonym--> Position 
Estimate <--Antonym--> Precise <--SimilarTo--> Dead <--RelatedTo--> Hay <--Synonym--> Sack 