Metal is related to Strong. Strong is related to Bitter. Bitter is the opposite of Sweet. Pork can be Sweet. 
Bear is related to Strong. Strong is a synonym of Substantial. 
Metal <--RelatedTo--> Strong <--RelatedTo--> Bitter <--Antonym--> Sweet <--HasProperty-- Pork 
Bear <--RelatedTo--> Strong <--Synonym--> Substantial 