Reasonable is related to Logical. Logical is a synonym of Legitimate. Legitimate is similar to Valid. Valid is a synonym of Available. 
Sigh is related to Home. you are likely to find Vessel in/at/on Home. Vessel is related to General. 
Reasonable <--RelatedTo--> Logical <--Synonym--> Legitimate <--SimilarTo--> Valid <--Synonym--> Available 
Sigh <--RelatedTo--> Home <--AtLocation-- Vessel <--RelatedTo--> General 