Sentiment is a type of Feeling. Sympathy is a type of Feeling. Sympathy would make you want to Forgive. one thing you do when you Forgive is Hug. 
Necessary is related to Essential. Essential is related to Life. Fun is part of Life. Fun can be Good. 
Sentiment --IsA--> Feeling <--IsA-- Sympathy --CausesDesire--> Forgive --HasSubevent--> Hug 
Necessary <--RelatedTo--> Essential <--RelatedTo--> Life <--PartOf-- Fun --HasProperty--> Good 