Pine is related to Scent. Scent is related to Nice. Sex can be Nice. 
Discuss is related to Debate. Debate can be Good. Good is similar to Solid. Solid is similar to Serious. 
Pine <--RelatedTo--> Scent <--RelatedTo--> Nice <--HasProperty-- Sex 
Discuss <--RelatedTo--> Debate --HasProperty--> Good <--SimilarTo--> Solid <--SimilarTo--> Serious 