Remain is a different concept from Empty. Empty is related to Sugar. Sugar is related to Tea. Tea is related to Boil. 
Meet is a synonym of Assemble. Assemble is related to Gathering. Gathering is related to Family. Uncle is part of Family. 
Remain <--DistinctFrom--> Empty <--RelatedTo--> Sugar <--RelatedTo--> Tea <--RelatedTo--> Boil 
Meet <--Synonym--> Assemble <--RelatedTo--> Gathering <--RelatedTo--> Family <--PartOf-- Uncle 