Maintain is a synonym of Observe. Observe is related to View. Viewer is derived from View. 
Ground is a type of Connection. Involvement is a type of Connection. Implication is a type of Involvement. 
Maintain <--Synonym--> Observe <--RelatedTo--> View <--DerivedFrom-- Viewer 
Ground --IsA--> Connection <--IsA-- Involvement <--IsA-- Implication 